acronimos radio

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Radio Acronyms 4000+ (Always under construction) By Hugh Stegman NV6H

At end of file:

Police/CB 10-codesOther police codesComputer networking standards

[~] = not an acronym, just looks like one

Radiospeak, techspeak, milspeak, NASAspeak, and compuspeak alldeveloped for spoken, sent, or stored brevity. As Larry Van Hornis always noting, acronyms and abbreviations don't always save allthat much space in written text. Utility World tries to slogthrough all the alphabet soup and write in good old English.

Sometimes we fail. Decode our lapses thusly:

Acronym Definition

// Parallel transmission (simulcast) on --/// Cloud layer below observing station+FC Tornado on the ground1 LT first lieutenant16-DPSK 16-Phase Differential Phase-Shift Keying16P4A 16 phase, 4 amplitudes2 LT second lieutenant220SMA 220 (MHz) Spectrum Management Assn (Amateur)2600 (1)2600 Hz, audio frequency used for US telephone idle tones2600 (2)Hack/Phreak magazine, named in honor of above2600 (3)Use of tone-spoofing equipment to control phone switches; now a good way to get caught phreaking and go to jail2G ALE Second generation automatic link establishment32BDA 32-Bit Disk Access (Windoze)3D Three dimensional (like some weather models)3F Three-figure code groups (mixed or all numbers)3FG Three-figure code groups3G ALE Third generation automatic link establishment3G Third Generation3GPP Third Generation Partnership Project3G-TM Third Generation Traffic Management Protocol3L Three-letter code groups3LG Three-letter code groups4F Four figure code groups (mixed or all numbers)4FG Four figure code groups4L Four-letter code groups4LG Four-letter code groups5 by 5 (1) Signal report: readability 5, strength 55 by 5 (2) Signal report: you are loud and clear5D Demand Driven Direct Digital Dissemination5F Five-figure code groups (mixed or all numbers)5FG Five-figure code groups5L Five-letter code groups5LG Five-letter code groups73 Old telegraphy slang: "Best regards"81-81 Strange Russian teleprinting system, popular in Cuba88 Old telegraphy slang: "Love and kisses"89/336/EEC European electromagnetic compatibility directive8-DPSK 8-Phase Differential Phase-Shift Keying8P2A 8 phase, 2 amplitudesA Index 24-hour magnetic activity index, lower=betterA (1)Altimeter settingA (2)Old "A" battery, for portable radio tube filamentsA&P Airframe & Powerplant, U.S. aircraft mechanic certificatea/c AircraftA/D Analog to digital converterA/G Air to groundA0 AM carrier with no modulation, now N0NA1 (Alpha-1) Aircraft maintenance status: no writeups; plane OKA1A Morse telegraphy for aural copy, i.e. "CW"A2 (Alpha-2) Status: write up non-mission-critical systemA2A Modulated CW telegraphy for aural copy, i.e. "MCW"A3 (Alpha-3) Status: write up critical system; mission abortedA3E AM voice or broadcastingAA CW prosign: "[repeat] all after"AAA Anti-Aircraft ArtilleryAAAS American Association for the Advancement of ScienceAAB Automatic Answer-Back (RTTY)AABCP Advanced airborne command postAACC Airborne Air Command CenterAADC Area Air Defense CommanderAAF (1)Auxiliary AirfieldAAF (2)Army Air Forces, obsoleteAAFES Army and Air Force Exchange ServiceAAIC Accounting Authority Identification CodeAAL ATM Adaptation LayerAAL-1 Synchronous adaptation layer designed for carrying voice trunk linesAAL-2 Adaptation layer intended for variable bit rate video, but never really got off the ground and is not offered by vendorsAAL-3/4 Adaptation layer intended to be used by Frame Relay and SMDS and other delay-insensitive variable rate or bursty data traffic, but mostly now passed over in favour of AAL-5AAL-5 'Simple and efficient adaptation layer' for computer networkingAALC (1)Amphibious Assault Landing CraftAALC (2)Amplified automatic level controlAAM Air to Air MissileAAMDS Automated Air Movement Data SystemAAMSS Arinc Aeronautical Mobile Satellite Service (proposed; would replace much of MWARA)AAR (1)Air to Air RefuelingAAR (2)After-Action ReviewAAR (3)Automatic Alternate ReroutingAAR (4)Assn. of American RailroadsAARS Army Amateur Radio System, started 1925, now part of MARSAASS Advanced Air Surveillance RadarAATO Automated Air Tasking OrderAAV Assault Amphibious VehicleAAVP Advanced Aircrew Vision ProtectionAAW Anti-Air WarfareAB (1)Air BaseAB (2)CW prosign: "[repeat] all before"ABA Australian Broadcasting AuthorityABC (1)Atomic, Biological, Chemical (warfare)ABC (2)American Broadcasting CompanyABC (3) Australian Broadcasting CorporationABCA American, British, Canadian, AustralianABCC Airborne battlefield command and control centerABCCC Airborne Command Control CenterABCS Army Battle Command SystemABD Air Base DefenseABIS Advanced Battlespace Information SystemABITS Airborne Imagery Transmission SystemABL Airborne LaserABM Anti-Ballistic Missile


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ABN AirborneABNCP Airborne National Command PostABO Annular Beam OscillatorABOR AbortABU Asia Broadcast UnionAC (1)Alternating CurrentAC (2)Active Components (US Army)AC (3)Acquisition CenterAC&I Acquisition, Construction & ImprovementACA (1)Airspace control authorityACA (2)Australian Communications AuthorityACAA Automatic chemical agent alarmACAP Application Configuration Access Protocol (computing)ACAPS Area communications electronics capabilitiesACARS Aircraft Communications Addressing and Reporting SystemACAT Acquisition CategoryACC (1)Air Combat Command (US)ACC (2)Area Communication CenterACC (3)altocumulus castellanusACCHAN Allied Command ChannelACCINTNET ACC Intelligence NetworkACCMSF Advanced Cooperative Collection ManagementACCS Air Command and Control SystemACE Airborne Command ElementACERT Army Computer Emergency Response TeamACF Autocorrelation FactorACFT MSHP aircraft mishapACI Air Control InterceptACINT Acoustic intelligenceACIS Air Combat Information SystemACJ Advisory Circular, JointACK Positive Acknowledgment (ASCII 06)ACLS Automatic Carrier Landing SystemACM (1)Association for Computing MachineryACM (2)Advanced Cruise MissileACM (3)Air Combat Maneuvering ACMI Air Combat Maneuvering InstrumentationACOM U.S. Atlantic CommandACP (01)Allied Communication Publication (127, etc)ACP (02)Allied Communication ProtocolACP (03)Adjacent Channel PowerACP (04)Adjacent Channel ProtectionACP (05)Access Control PointACP (06)Access Control ProtocolACP (07)Access Communications ProcessorACP (08)Achieved Communication Performance (ARINC)ACP (09)Adaptive Communications ProcessorACP (10)Advanced Communications PackageACP (11)Alternate Command PostACP (12)Airborne Command PostACP (13)Area Command PostACP (14)Automated Command PostACP (14)Applied Communication ProgramACP (15)Automatic Communications ProcessorACP (16)Automatic Colt PistolACP (17)Autoloading Colt PistolACP100 Allied Call Sign and Address Group System - Instructions and AssignmentsACP110 Tactical Call Sign Book ACP112 Task Organization Call Sign Book ACP113 Call Sign Book for Ships ACP117 Allied Routing Indicator Book ACP119 Allied Tactical Voice Call Sign System - Instructions and Assignments ACP121 Communications Instructions - GeneralACP122 Communication Instructions - Security ACP123 Common Messaging Strategy and ProceduresACP124 Communication Instructions - Radiotelegraph ProcedureACP125 Communication Instructions - Radiotelephone ProcedureACP126 Communication Instructions - Radioteletype ProcedureACP127 Communication Instructions - Tape Relay ProceduresACP127SUP1A Allied RATT Procedures (RTTY)ACP128 ALTERS Operating ProceduresACP129 Communications Instructions - Visual Signalling Procedures ACP130 Direction Finding Procedure ACP131 Communication Instructions - Operating SignalsACP134 Telephone Switchboard Operating Procedure ACP135 Communications Instructions - Distress and Rescue ProceduresACP136 Communication Instructions - Panel Signaling ACP147 Call Sign Book for Merchant Ships in Time of War ACP148 Allied Guide to Master ACP149 Radio Communication Instructions for Merchant Ships Under Naval ControlACP150 Recognition and Identification Instructions, Air, Land, and Sea Forces ACP160 IFF SIF Operational Procedures ACP165 Operational Brevity Codes ACP167 Glossary of Communications-Electronics Terms ACP168 Pyrotechnic Signals ACP176 Allied Naval and Maritime Air Communication Instructions ACP177 Land Forces Electronic Warfare Instructions ACP178 Maritime Electronic Warfare Instructions ACP179 Electronic Warfare Instructions for Air Forces ACP190 Guide to Frequency Planning ACP198 Instructions for the Preparation of Allied Communications PublicationsACR Armored cavalry regimentACRM Automated Communication Resource ManagerACRONYM Actual Computer Related Overused Name You MentionACS (1)Assistant chief of staffACS (2)Agile Combat SupportACS (3)Airborne COMINT SystemACS (4)Attitude Control SystemACSB Amplitude Compandored SideBandACSL altocumulus standing lenticular cloudACT Airborne Communications TerminalACTD Advanced Concept Technology DemonstrationACTEX Active Controls Technology ExperimentsACTIVE Advanced Controls Technology for Integrated VehiclesACTS (1)Air Combat Training SystemACTS (2)Automated Computer Time ServiceACU Avionics Control UnitACW Air Control Wing (like 552nd AWACS at Tinker)ADA (1)Americans with Disabilities ActADA (2)"Official" DoD computer language, not an acronym, named for Ada Babbage, the world's first programmerADAS AWOS Data Acquisition System (Nice nested acronym)ADC Analog-to-Digital ConvertorADCC Air Defense Control Centeraddr AddressADDS Aviation Digital Data ServiceADES Airdrop equipment and systemsADF (1)Automatic direction findingADF (2)Australian Defence ForcesADIZ Air Defense Identification ZoneADM AdmiralADMD Administration Management DomainADO (1)ActiveX Data ObjectsADO (2)Active Data ObjectsADOC Air defense operation centerADONIS Article Delivery Over Network Information SystemsADP Automated data processingADPCM Adaptive differential pulse-code modulationADPE Automated Data Processing Equipment


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ADPS ASARS Data Processing StationADPSIS Automated Data Processing Software Inventory SystemADPSO Automated Data Processing Security OfficerADPSSO Automated Data Processing System Security OfficerADR CW brevity: addressADRG ARC Raster Digitized GraphicsADS (1)Advanced Distributed SimulationADS (2)Automatic Dependent SurveillanceADS-B Automated Dependent Surveillance-BroadcastADSI Air Defense System IntegratorADSL Assymetric Digital Subscriber LineAe Auroral Electrojet magnetic activity indexAEEC Airlines Electronics Engineering CommitteeAEOS Advanced Electro-Optical System SpectrographAEPDS Advance Electronic Processing and Dissemination SystemAES Application Environment SpecificationAF (1) Air ForceAF (2) Audio Frequency (30 Hz - 30 kHz)AFAMPE Air Force Automated Message Processing ExchangeAFATDS Advanced Field Artillery Tactical Data SystemAFB Air Force BaseAFC Automatic frequency controlAFCA Air Force Communications Agency (US)AFCS Automatic Flight Control SystemAFDC Air Force Doctrine CenterAFEPS ACARS Front-End Processor System (ground computer network)AFETR Air Force Eastern Test RangeAFEWES Air Force Electronic Warfare Effectiveness SimulatorAFFSA Air Force Flight Standards AgencyAFGIHS Air Force Geographic Information Handling SystemAFGWC Air Force Global Weather Central at Offutt AFB, NEAFI (1)Africa/Indian Ocean (MWARA)AFI (2)Air Force Instruction (official directive)AFI (3)American Film InstituteAFIT Air Force Institute of TechnologyAFIWC AF Information Warfare CenterAFK Absolute Frequency Keying (amateur very slow Piccolo)AFMC Air Force Materiel CommandAFMSS Air Force Mission Support SystemAFN American Forces Network (US broadcast for military)AFNET Air Force Integrated Telecommunications NetworkAFOS Automation of Field Operations and Services AFOSR Air Force Office of Scientific ResearchAFR Armed Forces RadioAFRES Air Force Reserve (US)AFRL Air Force Research LaboratoryAFRN Armed Forces Radio NetworkAFRTS Armed Forces Radio & Television ServicesAFS (1)Air Force StationAFS (2)Aeronautical Fixed ServiceAFSAA AF Studies and Analysis AgencyAFSATCOM Armed Forces Satellite CommunicationAFSFC Air Force Space Forecasting CenterAFSFCR AF Space Forecast Center ReplacementAFSK Audio frequency-shift keyingAFSOC Air Force Special Operations CommandAFSOF Air Force Special Operations ForcesAFTCO Air Force Telecommunications Certification OfficeAFTN Aeronautical Fixed Telecommunication NetworkAFV Alternate Fuel VehicleAFW Air Force WeatherAFWSS Air Force Weather Support SystemAFWTF Atlantic Fleet Weapons Training FacilityAG (1)Adjutant generalAG (2)Airlift GroupAGC Automatic gain controlAGE Aerospace Ground Equipment (pronounced like how old you are; when you replace it you order New Age)AGL (1)Above ground levelAGL (2)Air to Ground LaserAGM Air to Ground MissileAGU American Geophysical UnionAGWPE AGW Packet Engine (creator: SV2AGW)Ah Ampere-hour(s), battery capacityAH Authentication HeaderAHAMSL Antenna height above mean sea levelAHD Acoustic Hailing DeviceAHDL Analog Hardware Descriptive LanguageAHF Adaptive High FrequencyAHMSL Antenna height above mean sea levelAHP Army HeliportAI (1)Artificial intelligenceAI (2)Air InterdictionAI (3)Airborne InterceptorAI (4)Avionics InfrastructureAIA Air Intelligence AgencyAIC Air Intercept ControlAICPITS All India Coordinated Program of Ionosphere & Thermosphere StudiesAIDA Atmospheric Investigations of Dynamics over AreciboAIDC Automatic Identification and Data CaptureAIFSS Automated International Flight Service StationAIG (1)Address Indicator GroupAIG (2)Air Intelligence GroupAIM (1)Air launched Interceptor MissileAIM (2)AOL Instant Messenger (popular internet talk program)AIN Advanced Intelligent Network (US NCS)AIR (1)All-India RadioAIR (2)Aviation Incident Response (Red Cross)AIREP Air Report; weather observation, like a PIREPAIRES Advanced Imagery Requirements and Exploitation SystemAIRK Area interswitch rekeyAIRMET Air Meteorological InformationAIRST Advanced Infrared Search and TrackAIS (1)Automatic Identification System (USCG)AIS (2)(Universal) Automated Identification SystemAIS (3)Alarm Indication SignalAJ Anti-JamAJCOM Anti-Jam CommunicationsAkDT Alaskan Daylight Time, USAkST Alaskan Standard Time, USAL Approach and landingALARM Air-Launched Anti-Radiation MissileALC (1)Automatic level controlALC (2)Air logistics centerALC Air Logistics CenterALCC (1)Airborne Launch Control CenterALCC (2)Airlift Coordination CellALCE Airlift Control ElementALCF Airlift Control FlightALCM Air Launched Cruise MissileALCS (1)Airlift Control SquadronALCS (2)Airborne Launch Control SystemALE Automated Link EstablishmentALERT Attack & Launch Early Reporting to TheaterALF Absorption Limiting Frequency, realtime version of LUFAlGaN Aluminum-Gallium NitrideALOC Air lines of communicationAloha Wide-area net protocol, developed at U of HawaiiALP airport location point


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Alpha + # Aircraft maintenance status (1 is best)Alpha Hotel A-- H--- (also Adam Henry)ALQA Active Link Quality AnalysisALS Airlift squadronALTERS Allied Telecommunications Record SystemALU Arithmetic Logic Unit (computer h/w)ALW Airlift WingAM (1)Amplitude ModulationAM (2)Aeronautical MobileAM (3)Ante Meridian, hours between midnight and 11:59 localAMARC Association Mondiale des Radiodiffusuers CommunautairesAMASS Airport Movement Area Safety SystemAMBALG Algerian EmbassyAMC (1)Air Mobility Command (old Air Force MAC, MATS)AMC (2)Army Materiel Command (US)AMCC Air Mobility Control CenterAMCLD Active Matrix Liquid Crystal DisplayAMCO Aircraft maintenance companyAMCS Air Mobility Control SquadronAMD (1)American Micro-Devices (with Cyrix, Intel's competition)AMD (2)Automatic Message DisplayAMDRFM Advanced Monolithic Digital Radio Frequency MemoryAME (1)Automatic Message ExchangeAME (2)Air Mobility ElementAME (3)Amplitude modulation equivalentAMEDD Army Medical DepartmentAMI Alternate Mark InversionAMMCS Airborne Multimedia Multiservices Communication SystemAMO Air & Maritime OperationsAMOG Air Mobility Operations GroupAMOS Air Force Maui Optical SiteAMP Antenna Maintenance ProgramAMPS (1)Advanced Mobile Phone ServiceAMPS (2)Automated Mission Planning SystemAMRAAM Advanced Medium-Range Air-to-Air MissileAMRAD Amateur Radio Research And Development CorporationAMRS Austrian Military Radio SocietyAMS Analog Mixed SignalAMSA Australian Maritime Safety AgencyAMSAT Radio Amateur Satellite, Inc.AMSI Arctic Maritime Safety InformationAMTOR Amateur Teleprinting Over Radio (Ham SITOR)AMVER Automated Mutual Assistance Vessel Rescue SystemAMW Air Mobility WingAMX Air Mobility ExpressAN Army/Navy (prefix on US military type designators)AN/FRT Army/Navy Fixed Radio TransmittingAN/GRC Army/Navy General Radio CommunicationAN/MRC Army/Navy Mobile Radio CommunicationANARC Assn. of North American Radio ClubsANDVT Advanced Narrowband Digital Voice TerminalANG Air National GuardANGB Air National Guard BaseANI Automatic Number IdentificationANL Automatic noise limiterANMCC Alternate National Military Communications Center (?)-WAR 46Annmt AnnouncementAnnr AnnouncerANS Advanced Network Services, operates an Internet backboneANSI American National Standards InstitutionANT (1)Antenna [~]ANT (2)Advantaged Node technologyANZUK Australia, New Zealand, United Kingdom (alliance)ANZUS Australia, New Zealand, United States (alliance)AO Area of operationsAO1 automated station without precipitation discriminatorAO2 automated station with precipitation discriminatorAOA (1)Angle Of ArrivalAOA ACARS Over AVLC (ARINC, neat nested acronym)AOC (1)Air Operations CenterAOC (2)Army Operations Center (Pentagon)AOC (3)Air Operational ControlAOE Airport of EntryAOI Area Of InterestAOO Area of operationsAOR (1)Area of responsibilityAOR (2)Atlantic Ocean Region (USCG GMDSS)AOV ACARS Over VDL (ARINC, neat nested acronym)AOS (1)Acquisition Of SignalAOS (2)Area Of ServiceAp Planetary A index of geomagnetic activityAP Associated PressAPC Armored personnel carrierAPCO 25 New standard for digital public safety radioAPCO Association of Public Safety Communications OfficialsAPI Application Programming Interface (computers)APIC APCO Project 25 Interface CommitteeAPIPA Automatic Private Internet Protocol Addressing APL A Programming Language (computer code)APLink Amtor-Packet LinkAPNIC Asia Pacific Network Information CentreAPO (1)Air Post OfficeAPO (2)Army Post OfficeAPOD Aerial port of debarkationAPOE Aerial port of embarkationAPPCON Approach ControlAPRNT apparentAPRS (1)Automatic Position Reporting System, ham tracking w/GPSAPRS (2)Automatic Packet Reporting SystemAPRX approximatelyAPSC APCO Project 25 Steering CommitteeAPT Automatic Picture TransmissionsAPU Auxiliary Power UnitAQC Automatic Quick CallAR (1) Aerial refuelingAR (2) Ground track for aboveAR (3) CW prosign: "End of message"AR (4) Army RegulationARA Appletalk Remote Access, Mac networkingARB Air Reserve BaseARC (1)American Red CrossARC (2)Airborne Radio Communications (AN/ARC-xxx)ARC (3)Air Reserve ComponentARC-190 Common Collins mil HF aircraft radio, civil version is HF-190ARC-220 Fancy Collins HF radios for new US mil aircraftARC-230 Collins 400-watt HF Link-11/Tadil-A aircraft radio, civil voice version is HF-121ARCAL Aircraft Radio Control of Aerodrome LightingArchie Internet database search program, finds filesARCP Air Refueling Control PointARD Automatic Ring DownARDF (1)Automatic Radio Direction FindingARDF (2)Amateur Radio Direction FindingAREC (1)Air resource element coordinatorAREC (2)Amateur Radio Emergency Corps, now ARESARES Amateur Radio Emergency ServiceARF Air Reserve forcesARFA Allied Radio Frequency AgencyARFOR Army forces


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ARG (1)Amphibious Ready GroupARG (2)Air Refueling GroupARGOS Advanced Research and Global Observation SatelliteARIA Advanced Range Instrumentation AircraftARIB Association of Radio Industry Businesses (Japan)ARIDPCM Adaptive Recursive Interpolated Differential Pulse Code Modulation (whew!)ARIN American Registry for Internet NumbersARINC Aeronautical Radio, Inc (US radio consortium)ARIP Air Refueling Initial PointARISS Amateur Radio on the International Space StationARM Anti-Radiation MissileARMRV (1)Armored Mobile Reconnaissance Vehicle ARMRV (2)Armored Multi-Role VehicleARNG Army National GuardARO Army Research OfficeARP Address Resolution Protocol, InternetARPA Advanced Research Projects Agency, operated original InternetARPANET ARPA Network, became NSFNET, now separate from InternetARQ Synchronous transmission and automatic repetition teleprinter system ("Acknowledge Request")ARQ6-90 Six-character blocks simplex ARQ teleprinter systemARQ-E3 Single channel ARQ teleprinter systemARRL American Radio Relay LeagueARRS Aerospace Rescue and Recovery ServiceARS Amateur Radio ServiceARSA (1)Airborne Reconnaissance and Surveillance ArchitectureARSA (2)Airport Radar Service AreaARSOF Army special operations forcesARTCC Air Route Traffic Control CenterARTE (1)French media companyARTE (2)ADA Run Time EnvironmentARTG Amateur Radio Teleprinter Group (Swiss)ARTS Automated Remote Tracking StationARW Air Refueling Wing (USAF/AFRES)ARWO Aerial Reconnaissance Weather AS (1) Air stationAS (2) CW prosign: "Please Wait"AS (3) Analog secure (like original PARKHILL)AS (4)Submarine Tender (USN)ASA American Standards Association, obsoleteASAM Anti-Shipping Activity Message (warning)ASAP As Soon As [humanly] Possible; how one handles FLASH trafficASAR Advanced Synthetic Aperture SystemASARS Advanced Synthetic Aperture Radar System ASAS All Source Analysis System (US Army)ASAS-RWS ASAS Reconfigurable Work StationASAT AntisatelliteASB Aviation support battalionASC (1)AUTODIN Switching CenterASC (2)Accredited Standards Committee (ANSI)ASC (3)American Society of Cameramen (motion picture)ASC2A Air & Space Command & Control AgencyASCC Army service component commandASCIET All Services Combined Identification Evaluation TeamASCII American Standard Code for Information Interchange, 7-bit computer alphabet, usually extended to use 8th bitASCOT Air Support Command Operations Task (RAF Air Transport)ASD Assistant Secretary of DefenseASDE-3 Airport Surface Detection Radar SystemASDS Advanced SEAL Delivery System (a minisub; see SEAL)ASEAN Association of South East Asian Nations (old SEATO)ASECNA Agence pour la Securite de la Navigation Aerienne en Afrique et a MadagascarASF Advanced Systems Format (Microsoft media player)ASG (1)Aeronautical Standards GroupsASG (2)Area support groupASIC Application Specific Integrated Circuit ASID Advanced Secure Information Dissemination ASIM Automated Security Incident MeasurementASIO Australian Security Intelligence OrganisationASIT Adaptable Surface Interface Terminal ASK Amplitude Shift KeyingASL Above Sea LevelASLAR Aircraft Surge Launch and RecoveryASM (1)Air to Surface MissileASM (2)Analog Switching ModuleASM (3)Assembler (computer code)ASMB Area support medical battalionASMC Area support medical companyASME American Society for Mechanical EngineersASMRO Armed Services Medical Regulating OfficeASO Air surveillance officerASOC Air Support Operations CenterASOS Automated Surface Observation SystemASOTSE Army special operations theater support elementASP (1)Ammunition supply pointASP (2)Acquisition Support PlanASP (3)Active Server PagesASP (4)Application Service ProviderASR (1)Automatic Send-ReceiveASR (2)Airport Suveillance RadarAssn AssociationAssoc AssociationAST Atlantic Standard Time, CanadaASTM American Society for Testing and MaterialsASU Aircraft Starting UnitASW Anti-submarine warfareAT (1)Advanced Technology (IBM's original name for its improved PC, now a standard architecture)AT (2)Amateur (radio allocation code)ATA (1)Army Technical ArchitectureATA (2)AT AttachmentATA (3)American Trans AirATAPI AT Attachment Packet InterfaceATC Air Traffic ControlATCALS (1)Air Traffic Control and Landing System ATCALS (2)Air Traffic Control Liaison SectionATCCS Army Tactical Command & Control SystemATCS Advanced Train Control SystemATCT airport traffic control towerATD Advanced Technology DemonstrationATDL 1 Army Tactical Data Link 1ATF Advanced Tactical FighterATF Bureau of Alcohol, Tobacco & FirearmsATH Air Transportable HospitalATG Afloat Training Group (USN)ATHS Automatic Target Hand-off SystemATIS Automated Terminal Information System (usually voice loop)ATM (1)Asynchronous Transfer Mode, 53-byte packetsATM (2)Automated Teller MachineATM (3)Advanced trauma managementATMs Air Tasking MessagesATN Adventist Television NetworkATO Air Tasking OrderATOI Aerial Track Of InterestA-TOR Automated Telex Over RadioATP (1)Ammunition transfer pointATP (2)Appletalk Transaction Protocol, Mac networkingATP (3)Acquisition, Tracking & PointingATP (4)Authority to ProceedATP (5)Air Traffic ProceduresATR Air Transport Rack (standard airplane radio bay)


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ATR/ATC Automatic Target Recognition/ Automatic Target CorrelationATS (1)Aeronautical Telecommunications ServicesATS (2)Applications Technology SatelliteATSA Aviation and Transportation Security ActATU (1)Antenna Tuning UnitATU (2)Arab Telecommunications UnionATU-A Arabic ATU-80 alphabetATV (1)Amateur (fast-scan) televisionATV (2)All-Terrain VehicleAUI Attachment Unit Interface, EthernetAUSREP Australian Ship Reporting SystemAUTO Weather observation is from automated station [~]AUTOCONET Automatic Digital Network Conference NetworkAUTODIN Automatic Digital Network (US military)AUTOVON Automatic voice network (now DSN as of 1990)AUV Autonomous Underwater VehicleAUW All Up Weight (gross)AV Air VehicleAVC Automatic volume controlAVHRR Advanced Very High Resolution RadiometerAVI Audio Video Interleave (Microsoft file format)AVIM Aviation intermediate maintenanceAVL Automatic Vehicle LocatingAVLC (1)Aviation VHF Link ControlAVLC (2)Automatic Vehicle Location and ControlAVN AViatioN weather modelAVO Air Vehicle OperatorAVTR Airborne Video Tape RecorderAVUM Aviation unit maintenanceAWACS Airborne Warning And Control SystemAWADS Adverse Weather Aerial Delivery SystemAWAPS Automated Weather Distribution SystemAWDS Adverse Weather and Debriefing SystemAWG American Wire GaugeAWGN Arbitrary White Gaussian NoiseAWIPS Advanced Weather Interactive Processing System awk Aho, Weinstein & Kernighan, wrote a Unix script languageAWN Aviation Weather Network, now on US Air Force Digital Weather SwitchAWO American Waterway OperatorsAWOL Absent without leaveAWOS Automated Weather Observing SystemAWR Adventist World RadioAWS (1)Air Weather ServiceAWS (2)Advisory Warning SystemAWS (3)Automated Weather SystemsAWS (4)Automated Weather StationAWST Automated Weather StationAX.25 Amateur variant of CCITT X.25 packet radio protocolB (1)beganB (2)old "B" battery for tube plates, typically 90 voltsB&G Bombing & GunneryB/m BenchmarkB/U BackupB+ Tube plate voltage (highest in set)B8E Mode: Independent sideband, different voice programsB9W Mode: Independent sideband, mixed voice & data modesBA Braking actionBAA (1)Broad Agency AnnouncementBAA (2)Broad Area AnnouncementBAC Broad Area CoverageBAe British AerospaceBae British AerospaceBAI Backup Aircraft InventoryBAI Battle Area InterdictionBalun Balanced-to-unbalanced line transformer [~]BAM Beta and Advection Model (wx)BAN Base Area NetworksBANANA Build Absolutely Nothing Anywhere Near Anyone (municipal response to most radio proposals)BAQ Basic allowance for quartersBAS Basic allowance for subsistenceBASIC Beginners' All-Purpose Symbolic Instruction Code, computer languageBAT (1)Blood Alcohol Testing (the "Batmobile," in the field)BAT (2)File extension: execute as command list (Batch job)BAT (3)Brilliant Anti-armor SubmunitionBaud Computer transmission unit, one state transition per second, no longer one bit per second in complex modulation schemesBBC British Broadcasting CorporationBBCS Broadband Connectivity Service (Swisscom)BBIS Battle Broadcast Information SystemBBN Backbone networkBBS (1)Bulletin Board System (computer networking)BBS (2)Battery backup systemBC (1)BroadcastBC (2)Back courseBC (3)Patches (of sig. Weather)BC2A Bosnia Command & Control AugmentationBC3 Battle management and command, control and communicationsBCA Broadcast Control AuthorityBCB Broadcast Band (typically 540-1710 kHz)BCC (1)Base Communication CenterBCC (2)Bureau Communication Center (LAPD)BCC (3)Battlefield circulation controlBCC (4)Blind Carbon Copy (e-mail)BCD (1)Binary-coded decimalBCD (2)Bad conduct dischargeBCE Base civil engineerBCF Backup communications facility, Dahlgren, VABCFG Fog patchesBCI (1)Broadcast interference (from xmtr to bc)BCI (2)Binary-coded informationBCL (1)Broadcast listenerBCL (2)Broadcast Communications Limited (New Zealand)BCM Baseline correlation matrixBCO (1)Base communications officerBCO (2)Base contracting officerBCO (3)Broad concept of operationsBCP (1)Base communications packageBCP (2)Base comprehensive planBCS Broadcast Keying StationBCT Battlefield Communications Terminalbd BaudBDA (1)Battle damage assessmentBDA (2)Bermuda (NASA)BDAR Battle damage assessment and repairbde BrigadeBDU (1)HFDL: Basic Data UnitBDU (2)Battle dress uniformBEAR Beam Experiment Aboard RocketBEC Bulk encrypted communicationsBEEF Base Engineering Emergency Force,("Prime BEEF team")BEL Bell (ASCII, RTTY)Bel Unit of voltage or power ratio, named for Alexander Graham Bell, usually expressed in deciBelsBEP (1)Bit error probabilityBEP (2)break-even pointBER Bit Error RateBERT (1)Bit error rate test(er)BERT (2)Bit Error Rate TestingBF Basic FunctionBFACS Battlefield Functional Area Control Systems


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BFBS British Forces Broadcasting ServiceBFO (1)Beat frequency oscillator (CW/SSB mode of receiver)BFO (2)Backhaul follow-onBFSK Binary Frequency-Shift KeyingBG Brigadier generalBGEN Brigadier generalBGP Border Gateway Protocol (TCP/IP)BICE Bureau of Immigration and Customs EnforcementBID Billing IdentifierBIDDS Base integrated digital distribution systemBIDS Backup information display systemBIFC (1)Boise Interagency Fire Cache, obsoleteBIFC (2)Boise Interagency Fire Center, now NIFCBiFET Bipolar Field Effect TransistorBIH Bureau International l'Heur, International Time Bureau, coordinates UTC leap secondsBILS Ballistic Impact Locator SystemBin BinaryBIND (1)Berkeley Internet Name DomainBIND (2)Berkeley Internet Name Daemon (old)BIND (3)Buggy Internet Name Daemon (geekspeak)Binhex Binary to hexadecimal, usually for sending binaries as ASCIIBIOS Basic Input/Output System (part of computer op-system)BIOT British Indian Ocean TerritoryBIP Base Information ProtectBIPS (1)Billion Instructions per Second (computing)BIPS (2)Backup Impact Prediction SystemBIPS Billion Instructions Per SecondB-ISDN Broadband-Integrated Services Digital Network BIST Built-In-Self-TestBit (1)BInary digiT, a one or zero, basic digital information unitBIT (2)Built-In TestBIT Built in TestBit/s Bit per secondBITE Built-In Test EquipmentBITNET Because It's Time NETwork, from IBM, now globalBIU Bus interface unit (computer h/w)BK CW prosign: long break or break-inBKN Broken cloud coverBL (1)BaselineBL (2)blowingBLAISE (1)British Library Automated Information ServiceBLAISE (2)Blaise Pascal, French MathematicianBLDU Blowing dustBLER Block Error RateBLERT Block Error Rate TestingBLEVE Boiling Liquid Expanding Vapor ExplosionBLM Bureau of Land Management (US)BLOS Beyond line of sightBLPY SprayBLS Bureau of Labor Statistics (US)BLSA Blowing sandBLSN Blowing snowBM Battle ManagementBMC2 Battle Management, Command and ControlBMC3 Battle Management, Command, Control and CommunicationBMC3I Battle Management C3IBMC4ISR Battle Management C4I Surveillance and ReconnaissanceBMD Ballistic Missile DefenseBMDATC Ballistic missile defense advanced technology centerBMDC Ballistic Missile Defense CenterBMDCCC Ballistic missile defense command and control centerBMDE Ballistic missile defense enhancementBMDO Ballistic missile defense organization, formerly SDIOBMDOC Ballistic missile defense operating centerBMDSCOM Ballistic Missile Defense Systems Command, now U.S. Army Strategic Defense CommandBMEWS Ballistic Missile Early Warning SystemBMO Ballistic Missile Office (US)BMOPS Battle Management OperationsBMP (1)File extension: bitmap imageBMP (2)Battle manager processorBMS Backward Music Station (weird RF feedback on HF)BMT (1)Ballistic Missile ThreatBMT (2)Beam Management TerminalBMT (3)Bronx Motor TransitBMT (4)Ballistic Missile TechnologyBMT/SS Ballistic Missile transporter, storage and shippingbn BattalionBN CW prosign: repeat between -- and --BNC (1)Bayonet Neill-Concelman (cable connector)BNC (2)Bayonet Navy Connector (alternate)BNC (3)Blimped Noiseless Camera (Classic Mitchell)BNCC Base Network Control CenterBNCR Blimped Noiseless Camera, ReflexBnOC Battalion Operations CenterBNSC British National Space CenterBO Bad Order (inoperative unit writeup)BoD Board of DirectorsBOM Bureau Of Meteorology (Australia)BOND Beginning Of Next DayBOOTP Bootstrap ProtocolBOOTP Bootstrap Protocol (IP addressing)BOPS Billion operations per second (computing)BOQ Bachelor Officer QuartersBORAM Block-Oriented RAMBOSS Battlefield Optical Surveillance System BOT Beginning of Tapebot Robot, typically a network program that does an admin dutyBP BandpassBPI Boost-Phase InterceptBPL Broadband over Power Linebpp bits per pixelbps Bit per second, not necessarily a "baud"Bps Bytes per secondBPSK Biphase Shift KeyingBQ (1)Beam QualityBQ (2)Acknowledging receipt (DSC protocol)BR Bridgewire resistanceBR mistBRAC Base Realignment And ClosureBRACC Base Realignment And Closure Commission (US military)BRB Be Right Back (Internet)BRD Broadcastbrdg bridgeBRI Basic Rate InterfaceBRI Basic Rate ISDN, 2 64Kbps channelsBRV (1)Booster Recovery Vessel (NASA)BRV (2)Ballistic reentry vehicle (Stratcom)BS (1)Battle staffBS (2)Battle stationBS (3)BackspaceBS (4)aka "Bravo Sierra;" the excrement of bullsBSA (1)Brigade support areaBSA (2)Birmingham Small ArmsBSC Base security councilBSD Berkeley Software Distribution (Unix type)BSE Broadcast Satellite ExperimentBSS (1)Broadcast Satellite SystemBSS (2)Broadcasting Satellite Service


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BSSC Battle staff support centerBSTRS Base Support Trunked Radio System, aka "B-STARS"BSU (1)Baseband separation unitBSU (2)Bulk Storage UnitBSVS Backup Secure Voice SystemBT (1)("Bravo Tango") Bomb threatBT (2)CW prosign: short breakBT (3)British TelecomBTC Block transfer controller (computing)BTH Below (beyond) the horizonBTI British Telecom InternationalBTL Black telemetry (USAF)Btry BatteryBTS Broadcast Transmitting StationsBTW By the wayBuff Big Ugly Flying F[ellow] (B-52)BUFR Binary Universal Format for Representation BULLDOG BULLSEYE US Navy HF upgrade, like USAF's SCOPE, but includes DF [~]BUMCS Backup Master Control Station (GPS, Gaithersburg, MD)BUR Bottom Up Review BURN 1000W UHF aircraft orderwire (US mil; not an acronym, refers to high power)BVR Beyond Visual Range BVR Beyond visual rangeBW (1)BandwidthBW (2)Biological WeaponBWC Bandwidth CompressionBWS Base weather stationBX Base exchangeBZ ("Bravo Zulu") Good jobC (1)Capacitance, in faradsC (2)ConfidentialC (3)the C programming languageC (4)CelsiusC (5)Designator for head of British MI6C (6)Center (with reference to runway designation)c The speed of light, and radio waves, in a vacuumC&DH Communications & Data HandlingC&DP Communications & Data Processingc/s Callsignc/w CallwordC2 Command and ControlC2CM Command and Control CountermeasuresC2IPS Air Mobility Command and Control Information Processing SystemC2P Command and Control ProcessorC2V Command and Control VehicleC2W Command and Control WarfareC2WC Command and Control Warfare Commander (US Navy)C3 Command, Control and CommunicationsC3F Mode designation: television or videoC3I Command, Control, Communications and IntelligenceC3S Command, control and communications segmentC3SMP Command, control and communications system master planC4I Command, Control, Communications, Computers and IntelligenceC4ID Command, Control, Communications, Computers and intelligence DisseminationC4IFTW C4I for the WarriorC4ISR Command, Control, Communications, Computing, Intelligence, Surveillance, & ReconaissanceC4S Command, Control, Communications, Computer SystemsC4SMP Command, control, communications and computers system master planCA (1)civil affairsCA (2)COMSEC AccountCA (3)cloud-air lightningCA (4)Counter AirCA (5)Cyanoacrylate (Super Glue)CAATS Canadian Automated Air Traffic SystemCAB Combat Area BroadcastCACS Command And Control SquadronCAD (1)Computer-aided designCAD (2)Coherent amplitude detectorCAD (3)Computer-aided dispatchCAD/CAM Computer aided design/computer aided manufacturingCADRG Compressed Arc Digitized Raster GraphicsCAE (1)Common Application EnvironmentCAE (2)Computer Aided EngineeringCAEWIS Computer Aided Electronic Warfare Information SystemCAF Combat Air ForcesCAFWSP CAF Weather Support PackageCAI (1)Computer-aided instructionCAI (2)Cooperative Airborne IdentificationCAINS Carrier Aircraft Inertial Navigation SystemCAL Calibrate, calibrationCALLS Contact And Long-range Liaison System (USCG)CALM Codan Automated Link ManagementCALS (1)Computer-aided Acquisition & Logistics SystemCALS (2)Contingency Airfield Lighting SystemCAM Computer-aided manufacturingcamo CamouflageCAMO Computer-aided manual operationCAMSLANT Communications Area Master Station, AtlanticCAMSPAC Communications Area Master Station, PacificCAN (1)Cancel (ASCII)CAN (2)Controller Area Network (industrial automation)CANFORCE Canadian ForcesCANR Canadian NORAD RegionCANUS Canada/USCAOC (1)Combined Air Operations CenterCAOC (2)Combined Allied Operations Center, Vicenza, IT (Allied Force)CAP (1) Civil Air PatrolCAP (2) Carrierless Amplitude PhaseCAPCOM Capsule Communicator (NASA)CAPEG Cape Canaveral Ground Antenna (GPS)CAPPS Computer Assisted Passenger Prescreening SystemCAPS Center for the Analysis and Prediction of Storms (NWS)CAPT CaptainCAR Caribbean (MWARA)CARB Channel Availability Radio Bulletin (NATO)CARCAH Chief, Aerial Reconnaissance Coordination, All Hurricanes (NHC)CARIBROC Caribbean Regional Operations CenterCARR Corrective Action Request & ReportCAS (1)Close Air SupportCAS (2)Collision Avoidance SystemCAS (3)Calibrated Air SpeedCASE (1)Common automated system executionCASE (2)Computer-aided software engineeringCASE (3)Computer-aided system engineeringCASREP Casualty ReportCAT (1)Clear Air TurbulenceCAT (2)Computer Aided Transceiver, proprietary control interfaceCATIS Computer Aided Tactical Information SystemCATT Computer Assisted Technology TransferCATV Community Antenna Television ("cable")CAU Crypto Ancillary UnitCAV (1)Collision AvoidanceCAV (2)Conditionally Available (LA City FD)CAV (3)Ceiling and visibilityCAVOK Ceiling & Visibility OK (non-US METAR)CAVU Ceiling & visibility unlimitedCB (1)Citizen Band Radio (legal or otherwise, around 27 MHz)CB (2)Cumulonimbus (thundercloud)


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CBAA Community Broadcasting Association of AustraliaC-band 4-8 GHz microwave bandCBC Canadian Broadcasting CompanyCBFS Cesium Beam Frequency StandardCBM Central battle managementCBMAM Cumulonimbus mammatus cloudCBP Customs and Border ProtectionCBR (1)Chemical, Biological, Radiological (warfare)CBR (2)Constant bit rateCBRN Caribbean Basin Radar NetworkCBS Columbia Broadcasting System (U.S.)CBT (1)Computer-based trainingCBT (2)CombatCBTS Computer-based training systemCBU Cluster Bomb UnitCBW (1)Chemical & Biological (warfare)CBW (2)Constant bandwidthCC (1)Transmission is in Standard Chinese ("Mandarin")CC (2)Command & ControlCC (3)Command CenterCC (4)Control CenterCC (5)CommanderCC (6)Computer controllerCC (7)CopiesCC (8)C Compiler (unix)CC (9)cloud-cloud lightningCC&D Camouflage, concealment and deceptionCC&R Covenants, Conditions & Restrictions; what you check before buying a home if you intend to build an antenna thereCCAS Cape Canaveral Air Station, FL, formerly CCAFSCCB (1)Configuration Control BoardCCB (2)Computer Controlled Brake (railroad)CCC (1)Central computer complexCCC (2)Communications control complexCCC (3)Consolidated Command Center (NORAD)CCD Charge Coupled DeviceCCDM Consultative Committee for the Definition of the MeterCCDS Consultative Committee for the Definition of the SecondCCE (1)Command & control elementCCE (2)Consultative Committee on ElectricityCCEMRI Consultative Committee for Ionizing RadiationsCCG Calibration Coordination GroupCCIP Continuously-Computed Impact PointCCIR International Radio Consultative Committee, now ITU-RCCIR 476-4 International SITOR character setCCIRID Charge-coupled infrared imaging deviceCCITT Comite Consultatif International de Telegraphique et Telephonique (International Telegraph & Telephone Consultative Committee), obsolescentCCL Common Command LanguageCCM (1)Combined Cipher Machine (WWII Allies)CCM (2)Counter-CountermeasuresCCMC Canadian Centre for Maritime CommunicationsCCP Console Command Processor, part of CP/MCCPC Civil Communications Planning Committee (NATO)CCPDS-R Command Center Processing and Display System - ReplacementCCR Central Control RoomCCRP Continuously-Computed Release PointCCS (1)Continuous Commercial Service (power rating)CCS (2)Charge Control SystemCCSL cirrocumulus standing lenticular cloudCCT Computer Compatible TapeccTLD Country Code Top Level DomainCCTV Closed Circuit TelevisionC-cubed Command Control and CommunicationsCCV Code change verifierCCW (1)Counter-clockwiseCCW (2)Command & Control WarfareCCW (3)Continuous Carrier WaveCCW (4)Coherent CWCCW (5)Class C CW biasing (most efficient)CD (1)Compact DiscCD (2)Civil Defense (in U.S., now FEMA)CD (3)Carrier detect (modem line)CDA (1)Central distribution amplifierCDA (2)Command & data acquisitionCDB Command data bufferCDC (1)Canadian Department of CommunicationsCDC (2)Centers for Disease Control (US)CDC (3)Control Data CorporationCD-DA Compact Disc Digital Audio (format, part of the "Red Book")CDE Common Desktop EnvironmentCDF (1)Common Data FormatCDF (2)California Division of Forestry (fire fighters)CDHF Central Data Handling FacilityCD-I Compact Disc - Interactive (one format in the "Green Book")CDIS Canadian Defence Intelligence StaffCDL Common Data LinkCDM Chemical Downwind Message (US Army)CDMA Code Division Multiple AccessCDMA One (IS-95) Qualcomm 2nd generation CDMACDMA2000 3G CDMA technologyCDNU Control Display Navigation UnitCDR (1)CommanderCDR (2)Command destruct receiver (Stratcom)CD-R Compact Disc - RecordableCDRAM Cache Dynamic Random Access MemoryCD-ROM XA CD-ROM eXtended Architecture, extends the "Yellow Book"CD-ROM Compact Disc Read Only MemoryCD-RTOS Compact Disc - Real Time Operating System (CD-I)CDS (1)Canadian Defence StaffCDS (2)Combat Direction SystemCDT Central (US) Daylight TimeCDU Control display unit (fancy "control head")CE (1)Conformite Europeanne (European Conformity); mark put on products for EECCE (2)Committee that sets these requirementsCEC (1)Commission of the European Communities (drafts "CE" standards)CEC (2)Cooperative Engagement CapabilityCECOM US Army Communications Electronics CommandCENTCOM U.S. Central CommandCEOI Communications-Electronics Operation InstructionsCEP (1)Central East Pacific (MWARA)CEP (2)Circular Error ProbabilityCEP (3)Circular Error ProbableCEPPO Chemical Emergency Preparedness and Prevention OfficeCEPT Conference of Postal & Telecommunications Administrations (EU)CEPTAG Civil Emergency Planning Telecommunications Advisory Group (Joint US/Canadian)CERDEC Communications Electronics Research, Development and Engineering CenterCERN Centre Europ'eene por la Recherche Nucleaire, Center for European Nuclear Research, huge particle accelerator center, WWW originated thereCERT Computer Emergency Response Team (Internet security)CF (1)Canadian forcesCF (2)Center frequencyCFAP Commandement Force Aerienne de Projection (French AF)CFARS Canadian Forces Affiliate Radio SystemCFB Canadian Forces BaseCFBL Call Forwarding Busing Line (telco)CFBS Canadian Forces Broadcasting ServiceCFDA Call Forwarding Don't Answer (telco)CFEP Communications front end processorCFL Confidential Frequency List (good shortwave publication)CFM Cubic feet per minute


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CFR 33: USCG Navigation RegulationsCFR 46: USCG Vessel RegulationsCFR 47: FCC RegulationsCFR Code of Federal RegulationsCFS (1)Center for StandardsCFS (2)Canadian Forces StationCFT Center Frequency ToneCG (1)Coast GuardCG (2)Commanding GeneralCG cloud-ground lightningCGAS Coast Guard Air StationCG-C2 Coast Guard Command & ControlCGCWOA (US) Coast Guard CW Operators Assn. (see CW)CGDN Coast Guard Data NetCGM (1)Computer Graphics MetafileCGM (2)Corrected Geomagnetic coordinatesCGMS Coordinating Group for Meteorological SatellitesCGSIC Civil GPS Service Interface CommitteeCGU Canadian Geophysical UnionCh mkr Channel markerCh ChannelCHAP Challenge Handshake Authentication Protocol (PPP)CHATH Chemically/Biologically Hardened Air Transportable HospitalCHBDL Common High Bandwidth Data LinkCHBDL-ST Common High Bandwidth Data Link-Surface TerminalC-HFET Complementary Heterostructure Field Effect TransistorCHI cloud-height indicatorCHINO sky condition at secondary location not availableCHOP (1)Change in Operational ControlCHOP (2)Chief Operator (Navy MARS)CHOP (3)Counter Measures Hands-on ProgramCHS Combat health supportCHS Cylinder, Head, Sector (direct disk addressing)CIA Central Intelligence Agency (US)CIBAR Conference of International Broadcasters' Audience Research ServicesCIC (1) Combat Information Center (Navy)CIC (2) Combined Intelligence Center (US Air Force)CIC (3)Combined Intelligence CenterCICA Competition in Contracting ActCICBMs Conventionally-armed ICBMsCICS Customer Information Control System (IBM)CID (1)Circuit IdentifierCID (2)Combat IdentificationCIDE Communication Information Data ExchangeCIDR Classless Inter-Domain Routing (Internet, replaces class A-C)CIDX Canadian International DX ClubCIG ceilingCIIP Common Imagery Interoperability ProfilesCIJ Close In JammingCIL Command Image LibraryCINC Commander In Chief, replaced by CDR 2003CINCLANT C in C, Atlantic, obsoleteCINCNORAD C in C, NORAD, obsoleteCINCPAC C in C, Pacific, obsoleteCINCSTRAT C in C, Stratcom, obsoleteCIOL Common Interface Objects LanguageCIPO Commanders in chief Interoperability Program OfficeCIPSO Common Internet Protocol Security OptionsCIRC Cross Interleaved Reed Solomon CodeCIRAF French acronym for international broadcast zone systemCIRF Co-Channel Interference Reduction FactorCIS (1)Combat Intelligence SystemCIS (2)Commonwealth of Independent States (replaced USSR)CISC Complex Instruction Set ComputingCISCO Consolidated intelligence support to combat operationsCISPR International Special Committee on Radio InterferenceCIT California Institute of Technology (CalTech)CITS Combat Information Transfer SystemCI-V Radio computer interface made by IcomCIW Combined Intelligence WatchCIWS Close-In Weapons SystemCJCS Chairman, Joint Chiefs of Staff (US)CJCSI Chairman of the Joint Chiefs of Staff InstructionCJCSM Chairman of the Joint Chiefs of Staff MemoCJFET Complementary junction field effect transistorCJMAO Central Joint Mortuary Affairs OfficeCK Check (usually word count in a message)CL (1)Centerline Lighting SystemCL (2)CW prosign: I am closing my station (clearing)Class A (1)Stage is biased to conduct continuouslyClass A (2)High explosive (military phone patches)Class B Stage is biased to conduct on half of cycleClass C (1)Stage is biased to conduct less than halfClass C (2)Gunpowder (military phone patches)Class D Digital switchingClass E New, like DCLC Circuit Link ControlClg CallingCLIPER CLImatology and PERsistence (weather model) CLOVER Robust RTTY mode for HFCLR (1)ClearCLR (2)Clear below 12,000 feet (automated METAR)CLR (3)Common Language Runtime (MickeySoft)CM (1)CountermeasuresCM (2)Cipher MachineCM (3)Corrected Geomagnetic coordinatesCM (4)Chemical Mace, a tear gasCM (5)Configuration Managementcm (1)Centimetercm (2)Control monitorCMARS Cruise Missile Autonomous Routing SystemCMAS Cheyenne Mountain Air Station, was CMAFB, CMAFSCMAWS Common Missile Approach Warning SystemCMC (1)Cheyenne Mountain Complex (NORAD)CMC (2)Command management centerCMC (3)COMSAT Mobile Corporation, part of COMSATCMCS COMINT Mission Collection SystemCMD (1)CommandCMD (2)Network Command (ALE)CMDR CommanderCMDS Countermeasure Dispenser SetCME Coronal Mass Ejection, causes auroraCMF Combat Mission FolderCMI Computer-managed instructionCMIS (1)Cheyenne Mountain Interface SubsystemCMIS (2)Closed Loop Maintenance Information SystemCMLSA Commercial Microwave Landing System Avionics CMO (1)Central Measurement and Signature Intelligence (MASINT) OfficeCMO (2)Civil-military operationsCMOC Cheyenne Mountain Operations CenterCMOS (1)Complementary Metallic Oxide SemiconductorCMOS (2)Cargo Movement Operations SystemCMP Common Management PracticesCMR Crisis Management ReconnaissanceCMRS Commercial Mobile Radio ServiceCMS (1)Canadian Maritime ServiceCMS (2)Calendar Messaging Service (Solaris)CMS (3)Common Mapping System


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CMS (4)Community Management StaffCMS (5)Counter Measures SetCMS (6)Counter Measures SystemCMSA Cruise Missile Support ActivityCMT Cellular Mobile TelephoneCMU Cheyenne Mountain UpgradeCMX Crisis Management Exercise (NATO)CMY Cyan, Magenta, Yellow (subtractive color printing)CMYK Cyan, Magenta, Yellow, blacK (4-color printing)CN (1)Communications networkCN (2)Counter-narcoticsCNA Center for Naval AnalysisCNAAS Counter-narcotics air analysis systemCNCE Communications nodal control elementCNCS Centralized Net Control Station (Scope Command hub at Andrews AFB)CNE (1)Communications Network EnvironmentCNE (2)Communications Node EmulatorCNE (3)Certified Netware Engineer (Novell)CNES Centre National d'Etudes Spatiales (French space agency)CNI Communications, Navigation, and IDCNM (1)Communications Network managementCNMI Commonwealth of the Northern Mariana IslandsCNN Cable News NetworkCNO (1)Chief of Naval OperationsCNO (2)Casualty notification officerCNR Combat Net RadioCNRADL Canadian RADIL (ROCC/AWACS digital information link)CNS (1)Communications, navigation & surveillanceCNS (2)Central nervous systemCNS (3)Consolidated NOTAM System (Another nested acronym courtesy FAA)CNTRA Chief of Naval Air Training (pronounced "Sinatra" like the singer)CO (1)Commanding OfficerCO (2)Central Office (telcom)CO (3)Contracting Officerco UK version of .com (Internet domain)CO/MIS Commander, Management Information CenterCOA Courses of ActionCoax Coaxial cableCOBOL Common Business Oriented Language (clunky old programming code)COBRA DANE US military air surveillance radar systemCOBRA (1)Coastal Battlefield Reconnaissance SystemCOBRA (2)Counter Battery RadarCOBRA (3)Coaxial Beam Rotating Antenna COCOM Combatant commandCOD (1)Carrier Onboard DeliveryCOD (2)Collect On DeliveryCODAR Coastal Ocean Dynamics RadarCoDE Coherent Digital ExciterCodec Coder/DecoderCOE (1)Circle of ErrorCOE (2)Common Operating EnvironmentCOE (3)Central Office EquipmentCOFAS Commandement Force Aerienne Strategique (French AF)COFC Container On Flat Car (as opposed to container car)COFF Common Object File Format (Windoze)CofS Chief of StaffCOG Continuity Of Government (emergency plan)COI Critical Operational IssueCOIL Chemical Oxygen-Iodine Laser COL ColonelCOM (1)Computer file extension: load as simple command programCOM (2)Commercial domain (Internet)COM (3)Component Object Module (Windoze)COMACC Commander, Air Combat CommandCOMAFFOR Commander Air Force ForcesCOMAFSPACE Commander, Air Force Space CommandCOMARSPACE Commander, U.S. Army Space CommandCOMASWFORLANT Commander, ASW Forces AtlanticCOMCON Communications Condition (MARS)COMFAIRMED Commander, Fleet Air MediterraneanCOMFAIRWINGTEN Commander, Fleet Airwing TenCOMHSWINGONE Commander, Helicopter Antisubmarine Wing OneCOMINT Communications IntelligenceCOMJAM Communications jammingCOMM CommunicationsComm Communications (also "commo")COMMSTA Communication StationCOMMZ Communications zoneCOMNAVCOMTELCOM Commander, Naval Computer and Telecommunications CommandCOMOPTEVFOR Commander, Operational Test and Evaluation ForceCOMPATWING Commander, Patrol WingCOMPATWINGSLANT Commander, Patrol Wings AtlanticCOMPUINT Computer intelligenceCompul CompulsoryCOMPUSEC Computer Security COMSAT (1)COMmunication SATelliteCOMSAT (2)Comsat Corp., US consortium & INMARSAT Convention repCOMSEABASED Commander, Sea-Based ASW Wings, AtlanticCOMSEC Communication SecurityCOMSTAT Communications Status ReportCOMSUBLANT Commander, Submarine Forces, Atlantic (USN)COMSUBPAC Commander, Submarine Forces, Pacific (USN)COMTAC Communications TacticalCONCISE Cosine Network's Central Information Service for EuropeCONDX CW brevity: propagation conditions (usually wretched)CONELRAD Control of Electromagnetic Radiation, obsoleteConfig Configuration, configureconmara Italian Consulate, Maracaibo, Venezuelaconmars Italian Consulate, Marseille, Franceconmopr Italian Consulate, possibly Montpellier, Franceconmpla Italian Consulate, Mar del Plata, ArgentinaCONOP(s) Concept of Operations(s)CONS continuousconspie Italian Consulate, possibly St. Pierrecontolo Italian Consulate, Toulouse, FranceCONUS continental United Statesconwett Italian Consulate, Wettingen, SwitzerlandCOOP Continuity Of Operations (US Army)Coq Coquelet (French teleprinting system, after "Rooster")Coq8 8-bit CoqueletCOR (1)Carrier operated relayCOR (2)Consolidated Operations Room ("Lights Out")COR (3)Correction to a previously disseminated weather reportCORES Commission Registration System (FCC)COS Communication Operations SegmentCOSCOM Corps support commandCOSE Common Open Software EnvironmentCOSIP Computer Open System Interface ProcessorCOSPAS Acronym for Russian SARSATCOT Changeover timeCOTHEN Customs Over The Horizon Enforcement Network (US)COTS Commercial Off-The-ShelfCOWS Cells On Wheels (post-disaster cellphone service)CP (1)Command PostCP (2)CW general call: "Hello -- [2 or more callsigns follow]"CP (3)Contental Polar (air mass)CP/M Early Z80 operating system, might or might not have stood for "Control Program for Microcomputers," or "Control Program/Monitor." The guy who would know is dead, having narrowly missed out on being richer than Bill Gates.CPA (1)Closest Point of Approach


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CPA (2)Certified Public AccountantCPAS Cellular Priority Access ServiceCPCA Camp Parks Communications Annex (USAF)CPDLC Controller-Pilot Data Link CommunicationsCPE Customer Premise Equipment (telco)CPFSK Continuous-Phase Frequency Shift KeyingCPM Continuous Phase ModulationCPO Chief Petty OfficerCPR Cardio-pulmonary resuscitationCPS (1)Characters Per SecondCPS (2)Cellular Priority Services (US NCS)cps Cycle per second (one Hertz)CPT Captain (US Army)CPU Central Processing Unit (computer h/w)CPX Command Post Exercise (NATO)CQ General call: "Hello all stations"CQD "Hello All Stations, Distress," no longer usedCQWW CQ World Wide (Amateur DX contest)CR Carriage ReturnCRAF Civil Reserve Air Fleet CRATT Crypto Radio Teletype (usually military & encrypted)CRC (1)Cyclic Redundancy Check (computer error test)CRC (2)CONUS Replacement CenterCRC (3)Control & Reporting CenterCRE Control & Reporting ElementCREN Corporation for Research and Educational NetworkingCRIS Communications Resource Information Sharing (US NCS)CRM Computer Resource Management CRO (1)Cathode-Ray OscilloscopeCRO (2)Croatia (country code)CRO (3)Coaxial Resonator OscillatorCROSS Centres Regionaux Opérationnels de Surveillance et de Sauvetage (French RCC, see RCC)CRPLF French language: Francophonic Public Radio CommunityCRR CarrierCRRL Canadian Radio Relay LeagueCRS Coastal Radio StationCRT Cathode-Ray Tube (usually a computer terminal)CRTC Combat Readiness Training CenterCS (1)combat supportCS (2)communication squadronCS (3)Chicken S-itCS (4)Chemical Shield (a tear gas)CSAF Air Force Chief of StaffCSAR Combat Search and RescueCSARP Common SAR Processor CSB Corps support battalionCSC (1)Combat Support Center (AFOC)CSC (2)Combat stress controlCSC (3)Computer Software ComponentCSCI Computer Software Configuration ItemCSE Client/Server EnvironmentCSEL Combat Survivor Evader Locator (pilot survival radio)CSG (1)Carrier Strike GroupCSG (2)Corps support groupCSH Combat support hospitalcsh C-shell, popular Unix command interpreterCSMA/CD Carrier Sense Multiple Access/ Collision DetectionCSOM Computer Software Operators Manual CSP Communications Support ProcessorC-SPAN Cable-Satellite Public Affairs Network (US)CSS (1)Combat service supportCSS (2)Central Security Service (US SIGINT, run by NSA director)CSS (3)Cascading Style SheetsCSS (4)Content Scrambling System (DVD encryption)CSSCS Combat Service Support Control SystemCST (1)Central (US) Standard TimeCST (2)Caribbean Support TenderCST (3)Civil Support TeamCSTARS COMBAT SENT Technical Acquisition Receiver System CSU Computer Software UnitCT (1)Center TapCT (2)("Charlie Tango") - Communications Technician (on an aircraft)CTA Control AreaCTAF Common Traffic Advisory FrequencyCTAPS Contingency Tactical Air Combat SystemCTBT Comprehensive Test Ban TreatyCTC Centralized Traffic Control (railroad)CTCSS Continuous Tone Coded Squelch System ("PL")CTI Computer - Telephone IntegrationCTIA Cellular Telecommunications Industry AssnCTLZ Control ZoneCTP Critical Technical ParameterCTR Combat Training Range Ctrl (1)ControlCtrl (2)Computer's control key, sometimes shown with a ^CTS Clear To Send (Serial I/O handshaking line)CTT Commander's Tactical TerminalCU CW brevity code: "See you"CUAGN CW brevity code: "See you again"CUBIC Common User Baseline for the Intel CommunityCUCV commercial utility cargo vehicleCUL CW brevity code: "See you later"CV (1)USN Aircraft CarrierCV (2)Vice Commander CVBG Carrier Battle Group CVIC Carrier Intelligence CenterCVN US nuclear aircraft carrierCW (1)Continuous Wave (usually Morse code)CW (2)Clockwise (rotation)CW (3)Composite Wing CWDE Chemical Warfare Defense Ensemble CWIS Campus-Wide Information SystemCWISP Campus-Wide Information System ProtocolCWOC Composite Wing Operations Center CWP Central West Pacific (MWARA)CWS Combat Weather System Cygnus Cygnus, Your Gnu Support (nested recursion; see Gnu)CZ (Panama) Canal ZoneD (1)DownD (2)DiodeD/A Digital/Analog converterD/L (1)DownlinkD/L (2)DownloadD2 Degrade and DestroyD2C D-2 Small CassetteD3 Degrade Disrupt DenyD4 (1)Degrade Disrupt Deny DestroyD4 (2)Deny, Disrupt, Degrade, & DestroyD4EN Disrupt, Delay, Destroy, Exploit, or NeutralizeDA (1)Directional antennaDA (2)Department of the ArmyDA-2 Station changes directional pattern at night (FCC)DAC (1)Digital-to-Analog ConverterDAC (2)Disaster Assistance Center (FEMA)DAC (3)Disaster Application Center DACT Data Automated Control TerminalDAE Disaster Assistance Employee DAGS Data Architecture and Gateway Services


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dah Morse code dash [~]DAMA Demand Assigned Multiple AccessD-AMPS Digital Advanced Mobile Phone SystemDAMSON Doppler And Multipath Sounding NetworkDAQCS (1)Distress Alert Quality Control SystemDAQCS (2)Data Acquisition and Quality Control SystemDARN (1)Dual Auroral Radar NetworkDARN (2)Disaster Amateur Radio Network, SoCal 440 MHz systemDARO Defense Airborne Reconnaissance OfficeDARP Defense Airborne Reconnaissance ProgramDARPA Defense Advanced Research Projects AgencyDARTS Dynamic Avionics Real-Time SchedulingDAS Data Aquisition SystemDASR Digital Airport Surveillance RadarDAT Digital audio tapeDAWS Defense Automated Warning SystemDB (1)Directional BeaconDB (2)Dead bodydB Decibel (1/10 Bel, a logarithmic voltage or power ratio)dBA Sound level (corrected to "A" scale dB)dBc Decibels referenced to full-rated peak envelope powerDBCS Double byte character setdBd Decibel gain over dipole antennadBi Decibel gain over (theoretical) isotropic antennadBic Db gain over circular isotropicDBM (1)Doubly balanced mixerDBM (2)Data Block MessagedBm Decibels over 1 mW into 50 ohms, usually rf, 0 dBm = 0.316 VpDBMS Data Base Management SystemDBPSK Differential Binary Phase-Shift KeyingDBS Direct broadcasting satellite (system)dBW Db over one wattDC Direct CurrentDC1 Device Control 1 (ASCII flow control)DC2 Device Control 2 (ASCII)DC3 Device Control 3 (ASCII flow control)DC4 Device Control 4 (ASCII)DCA (1)Defense Communications Agency (now DISA)DCA (2)Defensive counter AirDCA (3)Dual-Capable AircraftDCAC Defense Communications Agency Circular (now DISA)DCD Data Carrier Detect (packet modems)DCDR Deputy CommanderDCE (1)Data Communication Equipment (like a modem)DCE (2)Distributed Computing EnvironmentDCG Deputy commanding generalDCI (1)Defensive Counter InformationDCI (2)Director of Central IntelligenceDCID Director of Central Intelligence DirectiveDCO Defense Coordinating Officer DCOM Distributed Component Object Model (Windoze)DCP (1)Data Collection PlatformDCP (2)Defense Cryptologic ProgramDCPA Defense Civil Preparedness Agency, now FEMADCR Direct Conversion Receiver ("Homodyne")DCS (1)Defense Communications SystemDCS (2)Disaster Communications System, amateur, from RACESDCS (3)Digital Coded SquelchDCS (4)Distributed Control SystemsDCT (1)Digital Communications TerminalDCT (2)Direct Cosine TransformDCTN Defense Commercial Telecommunications NetworkDCW Digital Chart of the WorldDD Dual DiversityDDD Maritime preamble for relayed distress messageDDDS Defense Data Dictionary SystemDDM DoD Data ModelDDN Defense Data NetworkDDNS Dynamic Domain Naming System/Server (Internet)DDO Dynamic Drive Overlay (used by Disk Manager on the PC)DDPO Defense Dissemination Program OfficeDDR Dual Diversity ReceiverDDRS Defense Data Repository SystemDDR Double Data Rate (memory)DDS (1)Direct Digital SynthesisDDS (2)Defense Dissemination SystemDDT (1)Delay/Denial TechnologyDDT (2)Dynamic Debugging Tool, named for old pesticideDE Morse code prosign meaning "from"DEA Drug Enforcement Administration (US)DEC Digital Equipment Corporation, made some nice computersDECCA Low-frequency CW phase comparison navigationDECM Deceptive Electronic CountermeasuresDECnet DEC's name for networking protocols and productsDECT Digital European Cordless TelecommunicationsDEFCON DEFense CONdition, 1-5; 5 is peace, 1 is global thermonuclear war (STRATCOM)DEMIZ DEW East Military Identification ZoneDEPCON Departure ControlDE-QPSK Differentially Encoded Quaternary Phase Shift KeyingDES Data Encryption StandardDES-FED Stronger (108 bit) DES used by US governmentDet DetectorDEW Distant Early Warning (radar in Canada)DF (1)Direction findingDF (2)Direction finder ("duffer")DF (3)Damping FactorDFAD Digital Feature Analysis DataDFAS Defense Finance and Accounting ServiceDFCC Digital Flight Control ComputerDFCS Digital Flight Control SystemDFCW Dual-Frequency Continuous WaveDFO Disaster Field OfficeDFRC Dryden Flight Research Center (NASA)DGM Digital group multiplexerDGPS-MSK Differential GPS, Minimum Shift KeyingDGPS-QPSK DGPS-QPSK : Differential GPS, Quarternary Phase ShiftDGS Deployable Ground StationsDHCP Dynamic Host Configuration ProtocolDHS Department of Homeland SecurityDHTML Dynamic Hypertext Markup Language (web)DIA Defense Intelligence AgencyDIAC Defense Intelligence Analysis CenterDIAL Differential Absorption LidarDIAM Defense Intelligence Agency ManualDICE Data Integration & Collection EnvironmentDIDOP Digital Image Data Output ProductDifferential GPS, Quarternary Phase Shift Keying DIG Domain Internet GroperDIGEST Digital Geographic Information Exchange StandardDIGI ~ Digipeater, simplex digital repeaterDII Defense Information InfrastructureDIMM Double In-line Memory ModuleDIMMS Double In-line Modular Memory SystemDIN German standards agencyDIOP Data Input/Output PortDIP Dual In-line Package (chips or small switches)Diplo Diplomatic traffic, usually encryptedDIPS Digital Image Processing System


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DIRCM Directed Infrared CountermeasuresDIRMOBFOR Director of Mobility ForcesDIS (1)Defense Investigative ServiceDIS (2)Distributed Interactive SimulationDIS (3)Distributed Interactive SystemDIS (4)Draft International StandardDIS (5)Daily Intelligence SummaryDIS (6)Data and Information SystemDIS (7)Defense Information SystemDIS (8)Defense Intelligence ServiceDISA Defense Information Systems AgencyDISAC Defense Information Systems Agency CircularDISC Packet control frame: DisconnectDISCO Defense Industri+al Security Clearance OfficeDISCOM Division support commandDISN Defense Information Systems Networkdit Morse code dot [~]DITAW Detect, Identify, Track, Assesment, & WarnDIW Dead in the waterDIWSA Digital Imagery Workstation Suite AfloatDJ Deceptive JammingDJBDNS Daniel J. Bernstein DNS (more secure than BIND)DL (1)DownloadDL (2)Data LinkDL (3)Driver's License (police)DLA Defense Logistics AgencyDLC Data Link ControlDLE Data Link Escape (ASCII)DLL Dynamically Linked Library (computer programs)DLQ Deck Landing QualificationDLRP Data Link Reference Point, a USN authenticatorDM (1)Delay Modulation (Miller Coding)DM (2)Packet control frame: Disconnect Mode (busy)DMA (1)Direct Memory AccessDMA (2)Defense Mapping AgencyDMAAC Defense Mapping Agency Aerospace CenterDMAHC Defense Mapping Agency Hydrographic Center DMAHTC DMA Hydrographic Topographic CenterDMAL Defense Mapping Agency ListDMAT Disaster Medical Assistance TeamDMATC Defense Mapping Agency Topographic CenterDMC Defence Management Committee (Canada)DMCA Digital Millennium Copyright ActDMD Digital Micromirror DeviceDME Distance Measuring Equipment (airport approach)DMI Depot Maintenance InterservicingDMSO Defense Modeling and Simulation OfficeDMSP (1)Distributed Mail System ProtocolDMSP (2)Defense Meteorological Satellite ProgramDMT Discrete Multi-ToneDMTD Digital Message Transfer DeviceDMTF Distributed Management Task ForceDMUX DemultiplexerDMZ Demilitarized Zone (Korea)DN (1)Dutch (Royal) NavyDN (2)Directory Number (telco)DNC Digital Nautical ChartDNCC Deployed Network Control CenterDND Department of National Defence (Canada)DNS Domain Naming System/Server (Internet)DNSSEC DNS SecurityDO design objectiveDOA Dead On ArrivalDOB Date Of Birth (police)DOC (1)Department of Commerce (US)DOC (2)Department Of Communication (Canadian "FCC")DoD Department of Defense (US)DoDD Department of Defense DirectiveDoDIIS (1)Defense Intelligence Information System DoDIIS (2)DOD Intelligence Information SystemDODISS (3)Department of Defense Index of Specifications and StandardsDoDISS (4)DoD Index of Specifications and Standards DoDSI Department of Defense Security InstituteDoDSSP DoD Single Stock PointDOE Department Of Energy (US)DOI Department Of the Interior (US)DOJ Department Of Justice (US)DOMS Director Of Military Support (MARS)DOS (1)Department of State (US)DOS (2)Disk Operating System (generic)DOS (3)MS-DOS (proprietary PC op-sys)DOS (4)PC-DOS, IBM version of above, obsolete?DOS (5)Denial of Service (attack)DOT Department of Transportation (US)DOW Doppler On Wheels (storm chasing radar equipment)DP Development PrototypeDPCA Displaced Phase Center AntennaDPCM Differential Pulse Code ModulationDPDT Double-Pole, Double ThrowDPG Defense Planning GuidanceDPL Diode-Pumped LaserDPSK Differential Phase-Shift KeyingDPST Double-Pole, Single-Throwdpx DuplexDQPSK Differential Quadrature Phase-Shift KeyingDR low driftingDRAC Dynamic Relay Authorisation ControlDRAM Dynamic Random Access MemoryDRE Drug Recognition ExpertDRFM Digital Radio Frequency MemoryDRFMU Digital Radio Frequency Memory UnitDRM (1)Digital Radio MondialeDRM (2)Digital Rights ManagementDRO Dielectric Resonator OscillatorDRS Deployable Red SwitchDRSN Defense RED Switch NetworkDS (1)Direct supportDS (2)Dust stormDSA Division support areaDSA/SMC Deputy for Systems Acquisition/Systems Management CenterDSB Double sidebandDSC Digital Selective Calling (GMDSS)DSI Defensive Simulation InternetDSL Digital Subscriber LineDSLAM Digital Subscriber Line Access MultiplexerDSM Digital Switching ModuleDSN Defense Switched Network (old AUTOVON)DSNET Defense Secure Network DSNT distantDSOR Depot Source of RepairDSP Digital signal processingDSR Data Set Ready (Serial I/O primary handshaking line)DSRC Dedicated Short Range CommunicationsDSS Digital Satellite SystemDst Disturbance Storm Time, equatorial magnetospheric activity indexDSTO Defence Science & Technology Organisation (Australia)DSVD Digital Simultaneous Voice and DataDSVT Digital Subscriber Voice Terminal


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DSW Russian CW brevity code: "Daswedanya" (Goodbye)DT (1)District T (USCG)DTAC Division tactical command postDTC Design to CostDTD Data Transfer DeviceDTE Data Terminal Equipment (computers, workstations, dumb terminals)DTED Digital Terrain Elevation DataDTG Date time group (typically ddhhmm mon yy tz)DTIM Delivery Traffic Indication MessageDTM (1)Data Text MessageDTM (2)Data Transfer Module DTM (3)Digital Technology ModelDTMF Dual Tone Multi Frequency (like telco "touch tone")DTMF-RA Dual Tone Multi-Frequency - Remote AccessDTO Division tactical operations centerDTOP Digital Topographic Data DTR Data Terminal Ready (Serial I/O primary handshaking line)DTS (1)Digital Transmission System (Euro radio e-mail s/w)DTS (2)Data Terminal SetDTS (3)Digital Terrain SystemDTSS Digital Terrain Support SystemDTT Digital Terrestrial TelevisionDTV Digital televisionDU (1)widespread dust (weather)DU (2)depleted uraniumDUATS Direct User Access Terminal SystemDUP-ARQ Hungarian diplomatic teleprinting systemDUPE CW prosign: message or contact is a duplicateDUSD Deputy Undersecretary of Defense DUT1 UTC correction interval to get UT1DV Distinguished VisitorDVA Department of Veterans AdministrationDVD Digital Versatile DiskDVFR Defense Visual Flight RulesDVI Digital Video InterfaceDVM Digital VoltmeterDVMT Dynamic Video Memory TechnologyDVP (1)Distinguished Visitor Protocol (US Air ForceDVP (2)Digital Voice Protection (Motorola DES mode)DW Deutsche WelleDX (1)Distant Transmitter. The distance can be either geographic or psychological.DX (2)First transmission of FEC characterDX (3)DuplexDXAC DX Advisory Committee (ARRL)DXCC Coveted amateur radio award, for confirming at least 100 countriesDXing The hobby of listening to distant radio or televisionDZ (1)Drop zoneDZ (2)drizzleDZST Drop Zone Support TeamE (1)Electromotive force (in volts)E (2)east, endedE (3)E-region (middle zone of ionosphere)E (4)Electric fieldEA (1)East Asia (MWARA)EA (2)Electronic AttackEAC Echelons above corpsEAD Echelons above divisionEAF Expeditionary AirfieldsEALS Emergency Airfield Lighting SystemEAM Emergency Action MessageEARN European Academic and Research NetworkEAS (1)Emergency Alerting System, replaced EBSEAS (2)Equivalent Air SpeedEAS (3)Electronic Article SurveillanceEBB Electronic bulletin boardEBC Emulated buffer computerEBCDIC Extended Binary Coded Decimal Interchange Code, old IBMEBIOS Enhanced Basic Input/Output System (PCs with disks over 540 meg)EBONE A pan-European Backbone serviceEBS Emergency Broadcasting System, replaced CONELRADEBU European Broadcasting UnionEC (1)Electronic CombatEC (2)Emergency CoordinatorECB Echelons corps and belowECC (1)Error Correction Code (better than parity)ECC (2)Error Checking & Correcting (memory chip)ECC (3)Error Control CodingECCM Electronic Counter-CountermeasuresECCO Electronic Combat Coordination OfficerECDIS Electronic Chart Display and Information SystemECDIS-N Electronic Chart Display and Information System-NavyECHS Extended Cylinder, Head, Sector (addressing)ECM (1)Electronic countermeasuresECM (2)Electronic Cipher MachineECOM Emergency CommunicationsECRS East Coast Radar Systemed Edit; any of several funky line editors for old printing TTYs connected to computersEDC Error Detection CodeEDD Electronic Document DeliveryEDFMCM Environmental Data Fusion for Mine CountermeasuresEDGE Enhanced Data Rates for Global Evolution (telephony)EDI Electronic Document InterchangeEDO Extended Data Output (memory chip)EDP Electronic Data ProcessingEDPT Enhanced (fixed) Disk Parameter TableEDR Enhanced Data RateEDS Explosives Detection SystemsEDSAC Electronic Delay Storage Automatic Calculator (1949)EDT Eastern (US) Daylight Timeedu Educational Institution domain (Internet)EDVAC Electronic Discrete Variable Computer (1945)EE (1) Transmission is in EnglishEE (2) Person with Electrical Engineering degreeEEC European Economic CommunityEECEN Electronics Engineering Center, NJ (USCG)EEFI Essential Elements of Friendly Information (COMSEC)EEFI 1 Position (notification prepended by ZNX)EEFI 2 CapabilitiesEEFI 3 OperationsEEFI 4 Electronic WarfareEEFI 5 PersonnelEEFI 6 COMSEC breachEEFI 7 Wrong circuit usedEEFI 8-10 SpareEEI Essential Elements of Information (Federal report form)EEJ Equatorial Electrojet, might cause trans-eq spread-f propagationEEPROM Electronically Erasable Programmable Read Only MemoryEEZ Exclusive Economic Zone ("200-mile limit")EFAS Enroute Flight Advisory ServiceEFF Electronic Frontier Foundation, Internet free speech groupEFFI Essential Elements of Friendly InformationEFTO Encrypted for transmission onlyEGC Enhanced Group Call (GMDSS)EGP Exterior Gateway ProtocolsEGPRS Enhanced General Packet Radio ServiceEGS European Geophysical SocietyE-HA Enroute High AltitudeEHS External Hostile Structured threat


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EHU External Hostile Unstructured threatEI-232 Latest name for RS-232, the serial interface standardEIA (1)Electronic Industries Association, replaced RETMAEIA (2)Equatorial Ionization AnomalyEICC Emergency Information and Coordination Center (FEMA) EIDE Enhanced Integrated Drive Electronics, ATA version once proprietary to WDEIG External Interface GatewaysEINE EINE Is Not Emacs (recursive acronym; see Emacs)EIP ELINT Improvement ProgramEIRP Equivalent Isotropically Radiated PowerEIS Enhanced Imaging SystemEISA Extended Industry Standard ArchitectureEISCAT European Incoherent Scatter Radar (research)E-LA Enroute Low AltitudeELF (1) Extremely Low Frequency (30-300 Hz)ELF (2) US military comm system using same ("Project Elf")ELINT Electronic Intelligenceelm ELectronic Mailer (Unix)ELSEC Electronic SecurityELT Emergency Locator TransmitterELV Expendable Launch VehicleEM (1)ElectromagneticEM (2)Extended missionEM (3)Emergency managementEM (4)End of Medium (ASCII)Emacs Editing Macros, powerful if ungainly, Unix text editorE-mail Electronic mail, usually by computerEMC Electromagnetic compatibilityEMCON (1)Electromagnetic Radiation ControlEMCON (2)Emission Control (radio, etc, not smog)EMCS ELINT Mission Control SystemEME (1)Electromagnetic energyEME (2)Earth-Moon-Earth (VHF/UHF "moonbounce")EMF Electromotive force (back-EMF occurs in coils & motors)EMI Electromagnetic incompatibilityEMP Electromagnetic pulseEMS (1)Extended Memory Specification (IBM PC, old LIM spec)EMS (2)Emergency Medical ServicesEMSEC Emanations SecurityEMT Emergency Medical Technician, public safety certificateEMWIN Emergency Manager's Weather Information Center ENE East-northeastENF ELINT Notation Fileengr engineerENIAC Electronic Numerical Integrator And Computer, 1940s vacuum tube calculating machineENIGMA (1) European Numbers Information Gathering & Monitoring AssnENIGMA (2)[~]Historic German crypto machine, WW II code broken by AlliesENJEP Euro-Nato Jet Pilot Training (at Sheppard AFB)ENQ (1)Enquiry, sent by computer to get ACK/NAK response (ASCII 05)ENQ (2)Enquiry (Like Who Are You?)ENS External Non-Hostile Structured threatENTNAC Entrance National Agency CheckENU External Non-Hostile Unstructured threatEO Electro-OpticalEO/IR Electro-Optical/InfraredEOB Electronic Order of BattleEOC Emergency Operations CenterEOD Explosive Ordnance Disposal, the bomb squadEOL End of (design) lifeEO-LOROPS Electro-Optical Long Range Oblique Photography SystemEOP Emergency Operations Plan EOS Earth Observing SystemEOT (1)End Of TransmissionEOT (2)End Of TapeEOW End Of WatchEP Electronic ProtectionEPA Environmental Protection AgencyEPIC El Paso Intelligence Center (US Customs)EPIRB Emergency Position Indicating Radio BeaconEPL ELINT Parameter ListEPLRS Enhanced Position Location Reporting SystemEPROM Electrically Programmable Read-Only MemoryEPS (1)Emergency Planning SubcommitteeEPS (2)Enhanced Processing SegmentEPS (3)GOES Energetic Particle Sensor, measures solar flaresEPU Emergency Power UnitEPW Enemy prisoner of warER (1)Eastern RangeER (2)Emergency roomERASER Enhanced Recognition & Sensing RadarERFAK Emergency Response Fly-Away Kit (US Govt)ERLink Emergency Response Link (US Govt)ERMA Electronic Recording Machine Accounting (1959, first check reader)erp Effective radiated powerERPS External Frequency Interference Protection System ERT Emergency Response Team (FEMA)ERT-A Advance Element of the Emergency Response Team (FEMA) ERTS Earth Rotation Time Service, keeps track of planet's actual position in spaceES (1)Electronic SupportES (2)CW brevity code: "And"ES (3)Sporadic E propagation, or clouds making sameESA European Space AgencyESC (1)Enhanced Satellite Capability (US NCS)ESC (2)Escape (computer character)ESE East-southeastESF Emergency Support Function (part of NTSP; 1-12)ESM Electronic Support MeasuresESMC Eastern Space & Missile CenterESMTP Extended Simple Mail Transfer Protocol (does this mean it's no longer simple?)ESN Electronic Serial NumberESS (1)Electronic Switching System (landlines)ESS (2)Electronic Scoring SiteEST (1)Eastern (US) Standard TimeEST (2)Emergency Support Team (FEMA)ET (1)Extra-terrestrialET (2)External Tank (NASA)ET (3)Eastern Time (US)ETA Estimated time of arrivalETB End of Transmission BlockETD (1)Estimated time of departureETD (2)End-of-Train DeviceETD (3)Explosives Trace Detection ETLA Extended Three-Letter Acronym (a four-letter acronym)ETOH Alcohol (for some reason, paramedics say the chemical name)ETRAC Enhanced Tactical Radar CorrelatorETSI European Telecommunications Standards InstituteETX End Of Text (ASCII)EUCOM European CommandEunet European part of UUCP, Unix file transfer networkEUR Europe (MWARA)EUV Extreme ultraviolet (can ionize)EVS Electro-Optical Viewing System EW Electronic warfareEWIR Electronic Warfare Integrated Reprogramming EWMS Electronic Warfare Management System EWN Evangelical World Network, operates WEWNEWO (1)Electronic Warfare Officer (backseater) EWO (2)Emergency War Order


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EWPE EW Processing Element EWR Early Warning Radar EWS Early Warning SystemEXE Computer file extension: loads as executableEXE2BIN PC program for creating .COM files from .EXEf Frequency (in Hertz)F (1)Farad (a huge capacitor; usually uf or pf)F (2)F-region, highest zone of ionosphereF1 (1)In daytime, lower layer of F regionF1 (2)Frequency number one (F2, F3...)F2 In daytime, upper layer of F regionF/B Front to back ratio (antennas)F/O (1)Fiber opticsF/O (2)Follow-onF/V Fishing VesselF/W Fixed wing (airplane)F0 FM carrier, no modulation, sounds just like A0, now N0NF1B Mode designator: frequency shift keyingF2B Mode designator: Audio frequency-shift keyingF3C Mode designator: faxF3E Mode designator: FM voice or broadcastingFAA (1)Federal Aviation Administration (US)FAA (2)Foreign Assistance ActFAAA General call: "All French warships" [~]FAADC3 Forward Area Air Defense Command, Control, Communications Intelligence System (US Army)FAC (1)Field-Aligned Current, an irregular propagation modeFAC (2)Forward Air ControllerFACSFAC Fleet Area Control & Surveillance Facility (US Navy)FADEC Full Authority Digital Engine ControlFAE Fuel Air ExplosiveFAF (1)Fast Access FormatFAF (2)French Air ForceFAGDS Federation of Astronomical and Geophysical Data ServicesFAI Field-Aligned Irregularities, like FACFAM Federal Air MarshalFAPSI Federal Agcy for Govt Comm & Info (Russian, replaced KGB)FAQ Frequently Asked Questions (Internet/USENET)FAR Federal Aviation RegulationsFARP Forward Arming & Refueling PointFAS (1)Frequency Assignment Subcommittee (of IRAC)FAS (2)Federation of American ScientistsFASC Forward area signal centerFAST (1)Field Assessment Team (FEMA)FAST (2)Fleet Antiterrorist Strike Team (US Marines)FAST (3)Fast Auroral Snapshot Small Explorer satellite (NASA)FAST Field Adaptable Systems TechnologyFAT (1)File Allocation Table (MS-DOS)FAT (2)First Article TestFAT32 32-bit File Allocation Table (Newer MS-Windows)FAX FacsimileFB CW brevity code: "Fine Business" (really good)FBI Federal Bureau of Investigation (US)FBO Fixed Base OperatorFC funnel cloudFCC Federal Communications CommissionFCMP Fleet Composite Broadcast (USCG Honolulu)FCO Federal Coordinating Officer (FEMA)FD (1)Floppy DiskFD (2)Fixed Disk (confusing!)FDD Floppy Disk DriveFDDI Fibre Data Distribution InterfaceFDK Frequency-Difference KeyingFDM Frequency-Division MultiplexFDMA Frequency Division Multiple AccessFDPT Fixed Disk Parameter TableFDX Full DuplexFEBA Far East Broadcasting AssnFEC Forward error correction teleprinter systemFEC-A One-way traffic FEC teleprinter systemFECC Federal Emergency Communications CoordinatorFECTOR Teleprinting over radio, mode BFED-STD Federal Telecommunication StandardFEK Frequency Exchange KeyingFEMA Federal Emergency Management AgencyFEP (1)Front End Processor (computers)FEP (2)FLTSAT EHF Package (Navy)FET Field-effect transistorFEW Few cloudsFF (1)French ForcesFF (2)Transmission is in FrenchFF (3)Formfeed (ASCII)FFH (1)Fast Frigate HelicopterFFH (2)Fast Frequency Hopping (spread spectrum scheme)FFHT-net Fast-Frequency-Hopping Training netFFRDC Federally Funded Research& Development Center (MITRE Corp.)FFT Fast Fourier transformFG (1)Foreign Government (Foxtrot Golf)FG (2)FogFGS Federal German ShipFH Field hospitalFHWA Federal Highway Administration (US)FI Field Investigation, Field Interview (police)FIA (1)Fibreoptic Industry Association (UK)FIA (2)Federation Internationale d'Automobile (Formula 1 racing)FIBI filed but impracticable to transmitFIFO First in, first outFIGS Figures case (Baudot upper case)figs figures followFIM Flight Information ManualFINDS Flexible Information Dissemination SystemFIPS Federal Information Processing StandardsFIR (1)Flight Information RegionFIR (2)Finite Impulse ResponseFIRESCOPE Firefighting Resources of Southern California Organized for Potential EmergenciesFIRRS FAAR/Iceland Air Defense Remote Rekeying SystemFIRST (1)Forum of Incident Response and Security Teams (computers)FIRST (2)first observation after a break in coverage at manual stationFISIN Foreign Instrument Signals IntelligenceFISINT Foreign Instrumentation IntelligenceFIST Fleet Imagery Support Terminal (US Navy)FISTA Flying Infrared Signatures Technology AircraftFITFEEL Fast Information Transfer For Extremely Errored LinksFL (1)Flight levelFL (2)Focal LengthFLAK German: FLeigerAbwehrKannonen (anti-aircraft artillery)FLASER Forward Looking Infrared Laser RadarFLIP Flight Information Publication (US DoD)FLIR Forward looking infraredFlops Floating point operations per secondFLOT Forward Line of Own TroopsFLOTUS First Lady Of The United States (President's wife)FLR Forward looking radarFLT HICOM Fleet High Command, (US Navy)Flt (1)flightFlt (2)fleet (US Navy)FLTSAT Fleet Satellite, Navy comsatFLTSATCOM Fleet Satellite Communications (US Navy)FM (1)Frequency Modulation


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FM (2)Field manualFM (3)("Foxtrot Mike") VHF FM (US Navy)FM (4)CW brevity: FromFM (5)Field MeteorologicalFMA-net Frequency Management A-netFMH Federal Meteorological HandbookFMH-1 Federal Meteorological Handbook-1FMH-2 Federal Meteorological Handbook No.2FMO Frequency Management OfficeFMOW FM Orderwire (US military)FMP Fleet Modernization ProgramFMS Foreign Military SalesFMT-net Frequency Management Training netFN French NavyFNG Friendly new guy/gal (possible security risk)FNPRM Further Notice of Proposed Rule Making (FCC)FOB (1)Field Operations Bureau (FCC)FOB (2)Freight On Board (shipping regs)FOB (3)"Fresh Off the Boat" (humorous)FOD Foreign Object DamageFOIA Freedom of Information ActFOLDOC Free Online Dictionary Of Computing FORSCOM Forces CommandFORTRAN Formula Translator (early IBM computer language)FOSIC Fleet Ocean Surveillance & Information CenterFOT Optimum Traffic Frequency (fq that will work most days of period)FOUO For Official Use OnlyFOV Field of ViewFoxes THE QUICK BROWN FOX... test [~]FPLMTS Future Public Land Mobile Telecommunications SystemsFPM Fast Page ModeFPO Fleet Post OfficeFq FrequencyFQDN Fully Qualified Domain Name (Internet)FQPSK Filtered Quadrature Phase Shift KeyingFR (1)Frequency ResponseFR (2)Final reportFRA (1)Forward repair activitiesFRA (2)Federal Request for Assistance (FEMA)FRA (3)Fixed Radio AccessFRCM Federal Regional Coordinating Manager (FEMA)Freq FrequencyFRMR Packet control frame: Frame RejectFRN (1)FCC Registration NumberFRN (2)Free Radio NetworkFROPA frontal passageFRP (1)Federal Response Plan (FEMA)FRP (2)Fleet Response PlanFRQ frequentFRS Family Radio ServiceFS File Separator (ASCII)FS-1037C Official Federal Telecom Glossary, replaced by ATISFSB Forward support battalionFSBS (Consolidated) Fixed Submarine Broadcast SystemFSC Full Scope Command (USAF HF Phase II)FSD Federal Security DirectorFSE Fire support elementFSF Free Software FoundationFSK Frequency-shift keyingFSL Forecast Systems LaboratoryFSM Facility Status MessageFSOC Fairchild Satellite Op Center, Fairchild AFB, WAFSP (1)File Service protocol (Internet)FSP (2)File Slurping ProtocolFSP (3)Flaky Stream ProtocolFSP (4)FTP's Sexy PartnerFSRAM Fast Static Random Access MemoryFSS Fixed-Satellite ServiceFST Forward surgical teamFSTS Federal Secure Telecommunications SystemFSU Former Soviet UnionFT (1)Terminal Forecast (weather)FT (2)Feetft footFTA F--- The ArmyFTAM File Transfer Access and ManagementFTG F--- The GuardFTI Fixed Target IndicatorFTP File Transfer ProtocolFTS Federal Telephone SystemFTW F--- The WorldFU Smoke (from French)FUBAR [Fouled] Up Beyond All RecognitionFUD Fear, Uncertainty, Doubt (computer marketing technique)FV Fishing VesselFVLF Fixed, Very Low FrequencyFW Fighter Wing (USAF)FWA Fixed Wireless Accessfwd forwardFWE Fighter Wing Equivalent FWIW For What It's WorthFWOC Fleet Weather and Oceanographic Centre (UK)FY Fiscal YearFYEO For Your Eyes OnlyFYI For your informationFZ freezingFZRANO freezing rain sensor not availableG (1)Conductance, reciprocal of R, in mhos, ohm backwardsG (2)GustG/T "G over T", antenna gain divided by noise temperatureG1 Asst. Chief of staff, personnel (US Army)G2 Asst. Chief of staff, intelligence (US Army)G3 Asst. Chief of staff, operations and plans (US Army)G4 Asst. Chief of staff, logistics (US Army)G5 Asst. Chief of staff, civil affairs (US Army)G6 Asst. Chief of staff, information mgmt. (US Army)GA (1)CW prosign: go aheadGA (2)CW brevity code: Good AfternoonGaAs Gallium ArsenideGaAsFET Gallium Arsenide Field Effect TransistorGACC Geographic Area Coordination Centers (USFS)GAFRAN Stationary German Air ForceGAK Government Access to KeyGALEX Galaxy Evolution Explorer (NASA)GaN Gallium NitrideGantsec Greater Antilles Section (US military/federal, out of Puerto Rico)GAO General Accounting Office (US Government)GATM Global Air Traffic ManagementGATR ground-to-air transmitter/receiverGBDL Ground Based Data LinkGBI Ground-Based InterceptorGBL Ground-Based LaserGbps Gigabytes per secondGBR Ground Based RadarGBS (1)Global Broadcast SystemGBS (2)Ground Based SensorGCA Ground Controlled ApproachGCAS Ground Collision Avoidance System


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GCBS Ground Control Bombing SystemGCC Ground Component CommanderGCCS (0)Two different systems:GCCS (1)Global Command Control System, obsolete US Air ForceGCCS (2)Global Command & Control System, 1992 data network plan to replace WWMCCS computersGCHQ Government Communication Headquarters ("G;" UK comint)GCMP Guam Composite Broadcast (obsolete USCG)GCN (1)ground communications networkGCN (2)ground control networkGCSS Global Combat Support SystemGD CW brevity: Good DayGDIP General Defense Intelligence ProgramGDO Grid/Gate Dip OscillatorGDOC Geographical Display Operations ComputerGDR Ground Data ReductionGDSS Global Decision Support SystemGE (1)General ElectricGE (2)CW brevity: Good EveningGE (3) Guerra Elettronica (Italian for Electronic Warfare)GENSER (1)General Security RegulationsGENSER (2)general serviceGENTEL General Telephone CompanyGEO Geosynchronous Earth OrbitGEODSS Ground-based electro-optical deep space surveillanceGEOS (1)Geodynamic experimental ocean satelliteGEOS (2)Geomagnetic earth observation systemGEOS (3)Graphic Environment Operating SystemGEP Ground Entry PointGES Ground Earth StationGETS Government Emergency Telecommunications Service (US NCS)GFA Graphical Area ForecastGFAE Government-furnished aerospace equipmentGFDL Geophysical Fluid Dynamics LaboratoryGFE (1)Government-furnished equipmentGFE (2)God-Furnished Equipment (ionosphere)GFI (1)Government-furnished informationGFI (2)Ground Fault InterrupterGFM Government-furnished materialGFP (1)Government Furnished PropertyGFP (2)Government-furnished partGMSK Gaussian Minimum Shift KeyingGG Transmission is in GermanGHFS Global High Frequency System (US Air Force)GHz GigaHertzGI (1)Government IssueGI (2)Old slang, from above: U.S. soldierGID Group IdentificationGIF Graphics Interchange Format, first used on CompuServeGIGO Garbage In, Garbage Out; first rule of computingGIMP GNU Image Manipulation Program, a nested acronymGIS Geographical Information SystemGKS Graphical Kernel SystemGLOB Ground Loving Old B-----d (KC-135)GLONASS Global Navigation Satellite System (Russian GPS)GM (1)CW brevity code: Good MorningGM (2)General MotorsGM (3)General ManagerGM (4)Guided MissileGMDSS Global Maritime Distress & Safety SystemGMF (1)Ground Mobile ForceGMF (2)Government Master File (frequencies)GMI General Military IntelligenceGMRS General Mobile Radio SystemGMS Geostationary Meteorological Satellite (Japanese)GMT (1)Greenwich Mean Time (obsolete, still UK's name for standard time)GMT (2)Ground Moving TargetGMTI Ground Moving Target IndicationGNA Gulf News AgencyGNC (1)guidance and navigation computerGNC (2)guidance, navigation and controlgnd groundGNDCON Ground Controlgnu Gnu's Not Unix, a freeware op-system (recursive acronym)GO General OfficerGOA Gone on Arrival (police)GOES (1)Geosynchronous Oceanic & Environmental SatelliteGOES (2)Geostationary Operational Environmental Satellite GOGO government-owned, government-operatedGOJ Government of JapanGORIZONT Moscow State University Geostationary Monitor satelliteGOSIP Government Open Systems Interconnection Profile (UK & US)GOTS Government-off-the-shelfgov Government site (Internet)GOWON Gulf Offshore Weather Observing. Networkgp GroupGPM Gallon(s) per minuteGPO (1)Government Printing Office (US)GPO (2)General Post OfficeGPR Ground Penetrating Radar GPRS General Packet Radio ServiceGPS Global Positioning SystemGR Hail (from French)GRADU Gradual weather changeGRC General Radio Communications (AN/GRC-xxx)GRDCUS Gulf Range Drone Control Upgrade System grep Global Regular Expression, Print; Unix text searchGRI Group Repetition Interval (Loran)grp GroupGRT Gross register tonnageGS (1)General supportGS (2)Group Separator (ASCII)GS (3)small hail and/or snow pelletsGS (4)Ground StopGS (5)Ground StationGSA General Services Administration (US)GSAC Ground support associate contractorGSC (1)Ground systems controllerGSC (2)Ground support contractorGSCO Ground systems control officerGSD General support divisionGSE Ground support equipmentGSF GPS support facilityGSFC Goddard Space Flight Center, Greenbelt, MDGSM Global System for Mobile communicationsGSMP General Switch Management ProtocolGSO Geostationary Satellite OrbitGSTS Ground-based surveillance and tracking systemG-SWF Gradual Shortwave Fadeout (ionospheric disturbance)GTC Greek Telegraphy Club, aka SV-CW-CGTK GIMP Tool Kit, a deeply nested acronymgTLD generic top-level domainGTO (1)geosynchronous transfer orbitGTO (2)fast car made by Ferrari ("Gran Turisimo Omologato")GTO (3)not quite so fast car made by PontiacGTOC Geosynchronous transfer orbit capabilityG-TOR Golay Transmissions Over Radio (Kantronics version of PACTOR)GTS Global Telecommunication System (WMO)GUI Graphical User Interface


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GUID Globally Unique IdentifierGVAR GOES VariableGW (1)GigawattGW (2)CW brevity code: Good EveningGW (2)Ground wireGWARC General World Administrative Radio ConferenceGWEN Ground wave emergency network (VLF strategic net)GWT Gross Weight TonnageH (1)Henry (unit of inductance)H (2)Magnetic fieldh/w HardwareH24 All 24 hours; station operates continuouslyHA ("Hotel Alpha") human remainsHAARP HF Active Auroral Research ProgramHAAT Height Above Average TerrainHAC (1)higher authority communications(USAF)HAC (2)heading alignment circle (NASA)HAC (3)Hughes Aircraft CompanyHAES High Altitude ELINT SystemHAF Headquarters Air ForceHAL (1)High-order Assembly Language (space shuttle computers); named for:HAL (2)Heuristically programmed Algorithmic Computer (2001: A Space Odyssey)HAMP Horizontal Avionics Modernization PlanningHAMS Hilltop Amateur Mastertie System; old, big SoCal 440 MHz systemHAR Highway Advisory RadioHARCO Harris Radio Company, makes HF setupsHARM High-Speed Anti-Radiation MissileHAS Hardened Aircraft ShelterHASA High Altitude SIGINT ArchitectureHBD (1)Has Been Drinking (police)HBD (2)Hot Box Detector (railroad)HBI Horizontal Blanking Interval (TV)HBO Home Box Office (TV network)HBS Heart Beat Signal (Australian Internet)HBT Heterojunction Bipolar TransistorHBT Heterojunction Bipolar TransistorHC-ARQ Hagelin-Cryptos simplex teleprinter systemHCI Human-Computer InterfaceHCJB Heralding Christ Jesus' Blessing (callsign)HCP Health and comfort packageHD (1)Hard DiskHD (2)High DensityHDB High-Density BipolarHDD (1)Hard Disk DriveHDD (2)Heads Down DisplaysHDLC High-level Data Link Control, old synchronous computer protocolHDOP Horizontal Dilution of Precision (DGPS)HDR High Data RateHDS Hard Disk SubsystemHDSL High-rate Digital Subscriber LineHDTV High-Definition TelevisionHDX Half-duplexHE (1)high energyHE (2)high explosiveHEAR Hospital Emergency Alert Radio (SoCal)HEMP High-altitude electromagnetic pulseHEMT High-electron-mobility transferHEMTT Heavy expanded mobility tactical truckHEO (1)high earth orbitHEO (2)highly elliptical orbitHEP Head End Power (railroad locomotives)HERE Hazards of Electromagnetic Radiation to EquipmentHERF High-Energy RF (weapons)Hertz Unit of frequency, named for Heinrich Hertz, 1Hz=1 cpsHES Hurricane Evacuation StudyHETS (1)heavy equipment transporter systemHETS (2)heterodynes [~]Hex Hexadecimal number notation, base 16HF High Frequency (3-30 MHz)HFBC High-Frequency broadcastingHFCC High-Frequency Coordination ConferenceHFDL High-Frequency Data Link, single-tone digital aero modeHFDLP HF Data Link ProtocolHFDR HF Data RadioHFDU HF Data UnitHFGCS High Frequency Global Communication System (Scope Command)HFIA HF Industry AssociationHFMOD Australian Defence Force High Frequency Modernisation ProjectHFNC HF Network ControllerHFNPDU HFDL: High Frequency Network Protocol Data UnitHFO (1)High-Frequency OscillatorHFO (2)Honolulu Forecast OfficeHFS Hierarchical File SystemHFSWR High-Frequency Surface-Wave RadarHHS (Dept. of) Health & Human ServicesHHT (1)Hand-Held TerminalHHT (2)Hand-Held TesterHI CW brevity code: a laugh (all dits, easier to send than "HA")HICOM High Command net (US Navy)HIDAR High Data RateHIFER High-Frequency Experimental Radio (low-power ~13.5 MHz)Hi-fi High Fidelity (audio)HIPAS High-Power Auroral StimulationHIPPI High Performance Parallel InterfaceHIRF High Intensity Radiation FieldsHISCAT High-latitude, High-altitude, High-power, High-frequency, High-performance, Heating and ionospheric Scatter facility (research)HITRON Helicopter Interdiction Tactical Squadron (US Coast Guard)HIWAS Hazardous Inflight Weather Advisory ServiceHJ ("Hotel Juliet") HijackHK Handle Key (Windows registry)HKCC Handle Key, Current Configuration (Windows registry)HKCR Handle Key, Classes, Root (Windows registry)HKCU Handle Key, Current User (Windows registry)HKDD Handle Key, Dynamic Data (Windows registry)HKEY Handle to a KEY (Windows Registry)HKG Hong Kong (old country code)HKLM Handle Key, Local Machine (Windows registry)HKTI Hong Kong Telecom InternationalHKU Handle Key, Users (Windows Registry)HM Her MajestyHMCS Her Majesty's Canadian ShipHMMWV High mobility, multipurpose wheeled vehicle (hummvee)HMS Her Majesty's ShipHND Honduras (country code)HNG Hungary (country code)HNG-FEC Hungarian diplo FEC teleprinting systemHNMP HF Network Management ProtocolHNS Host nation supportHOLF Helicopter Outlying Landing FieldHP (1)High Pass (filter circuit)HP (2)Highway Patrolhp HorsepowerHpa HectopascalHPC Hydrometeorological Prediction Center, MDHPE CW brevity code: "Hope to..."HPG Hardcopy Processor GroupHPI High-Priority Intercept (global HF comint system)HPM High Power Microwave


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HPTS High-Power Transmitting System (TACAMO)HQ HeadquartersHQAN HAVE QUICK A-Net HQDA Headquarters, Department of the ArmyHR High Resolution hr HourHR Hybrid Receive HRC Harmonically Related Carrier (CATV channel scheme)HRCS High Resolution Camera System HRMP HF Relay Management ProtocolHRPT High Resolution Picture TransmissionsHRR High Resolution Radarhrs HoursHRT Hostage Rescue Team (FBI)HRT Hrvatske Radio Televizije (Croatian)HRV Croatia (country code)HSAL High Speed Algebraic LogicHSFB High Speed Fleet BroadcastHSI Hyperspectral Imaging HSIP H Camera Sensor Improvement Program HSSP HF Station Status ProtocolHST (1)Hawaiian Standard TimeHST (2)Hubble Space TelescopeHT (1)Handie-talkie, a hand-held radioHT (2)Horizontal Tab (ASCII)HTI (1)Haiti (country code)HTI (2)Hostile Target IdentificationHTML Hypertext Markup Language (world wide web)HTS High Temperature SuperconductingHTTP HyperText Transmission Protocol (WWW)HTTPD HTTP Daemon (Unix)HTTP-NG HTTP Next GenerationHTTPS (1)HTTP ServerHTTPS (2)HTTP with Secure Sockets LayerHUD Heads-up DisplaysHULTEC Hull to Emitter Correlation HUMINT Human Intelligence (spies!)HVAR High-Velocity Aerial RocketHW CW brevity code: "How do you copy me?"hx Signal is a harmonicHYDROLANT US warnings for Atlantic and eastHYDROMET Hydro-Meterological bulletin or warningHYDROPAC US warnings for Pacific Ocean and westHyperfix Hyperbolic Radio Navigation System (proprietary name)HZ hazeHz Hertz (a "cycle per second")I (1)Current (in amperes, amps)I (2)Packet designator: information frameI (3)Italy (country code)I/O Input/Output (computers)i18n Alphabet scheme for multi-lingual computer programs [~]IA (1)Information AssuranceIA (2)Italian ArmyIA (3)Short for IATSE, the movie/theatrical production unionIA (4)Information AttackIAAFA Inter-American Air Forces AcademyIAB Internet Architecture BoardIAC International Analysis Code (weather codes FM-45, FM-46)IADS Integrated Air Defense SystemIAEM International Association of Emergency Managers (was NCEM)IAF Italian or Irish air forceIAG Imagery Analysis GroupIAGA International Association of Geomagnetism and AeronomyIAIP Information Analysis and Infrastructure ProtectionIANA Internet Assigned Numbers AuthorityIAPS I Am Pretty SureIARN International Amateur Radio NetworkIARP International Amateur Radio Permit (to operate overseas)IARU International Amateur Radio UnionIAS (1)Image Access ServiceIAS (2)Indicated Air SpeedIAS Intelligence Analysis SystemIATA International Air Transport AssociationIAU International Astronomical UnionIAVTR Integrated Audio Visual Transmitter/ ReceiverIAW In accordance withIBC (1)International Broadcast Center (Olympics)IBC (2)Italian Broadcasting CorporationIBCT Initial Brigade Combat TeamsIBDL Inter Battery Data LinkIBM (1)International Business Machines (company)IBM (2)de facto PC standard, though few are true blueIBOC In-band, on-channel (digital broadcasting)IC (1)Integrated circuit (chip)IC (2)Incident CommandIC (3)Ice crystalsIC (4)In-cloud lightningICAO International Civil Aviation OrganizationICAP Internet Calendar Access ProtocolICAS Intermittent Commercial and Amateur service (rating)ICBM Intercontinental Ballistic MissileICD Interface Control DocumentICE (1)Immigration and Customs EnforcementICE (2)Intrusion Countermeasures ElectronicsICM Intelligence Correlation ModuleICMP Internet Control Message ProtocolICNIA Integrated Communications Navigation IFF AvionicsICNIS Integrated Communication Navigation and ID SystemICOM (1) IntercomICOM (2) Japanese radio mfr [~]ICOM (3) Integrated COMSECICON Image Communication and Operations NodeICP Internet Cache ProtocolICPO International Criminal Police Organization, see INTERPOLICQ "I Seek You" (Internet message program) [~]ICRC International Committee of the Red CrossICS Incident Command SystemICSTIS Independent Committee for the Supervision of Standards of Telephone Information Services (UK)ICW interrupted continuous waveID (1)IdentificationID (2)Inside DiameterIDAS Integrated Air Defense SystemIDASS Integrated Data Analysis System for SpacecraftIDCP ID Data Combining ProcessIDE (1)Intelligent Drive Electronics (small HD standard)IDE (2)Integrated Developer EnvironmentIDECM Integrated Defensive ECMI-DGS Interim-Deployable Ground StationIDLM Interference Detection, Locating, and MitigationIDM Improved Data ModemIDN Internationalized Domain NamesIDPS Interim Digital Processing SystemIDSL ISDN Digital Subscriber LineIEC International Electrotechnical CommissionIED (1)Improvised Explosive DeviceIED (2)Imitative electronics deceptionIEE (1)Institute of Electrical Engineers (US), merged with IREIEE (2)Institution of Electrical Engineers (UK)


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IEEE Institute of Electrical & Electronics EngineersIETF Internet Engineering Task ForceIF Intermediate Frequency (of a receiver)IFE Inflight emergencyIFF (1)Identification, Friend or FoeIFF (2)Logic operation: "if and only if"IFIM International Flight Information ManualIFK Incremental Frequency KeyingIFL International Frequency List, ITU doc on fiche or 2 CDsIFOR Implementation Force ("UN peacekeepers")IFP Image Formation ProcessorIFPS Interactive Forecast Preparation SystemIFR (1)Instrument Flight RulesIFR (2)"I Follow Roads"IFRB International Frequency Registration BoardIFRC Int'l Federation of Red Cross/Red CrescentIFSAR Interferometric Synthetic Aperture RadarIGBT Insulated Gate Bipolor TransistorIGDL Interoperable Ground Data LinkIGMP Internet Group Management ProtocolIGMP Internet Group Management ProtocolIGP Interior Gateway ProtocolsIGRP Interior Gateway Routing ProtocolIGY International Geophysical Year, big 50's research intervalIHFR Improved high frequency radioIHO International Hydrographic OrganizationIHS Internal Hostile Structured threatIHU Internal Hostile Unstructured threatIL Intermediate Language (Object-oriented computing)ILC Integral Locomotive Computer (railroad)ILS Instrument Landing SystemIM (1)Intermodulation, causes spurious signals or distortionIM (2)Integrity Monitor (DGPS)IMA Individual Mobilization Augmentee (FEMA)IMAP Internet Message Access ProtocolIMC Internet Mail ConsortiumIMD Intermodulation DistortionIMETS Integrated Meteorological SystemIMHO In My Humble Opinion (Internet)IMI CW prosign: interrogative; more often written "?"IMINT Imagery IntelligenceIMIS Integrated Maintenance Information SystemIMM Image Manifest MessageIMN Iraqi Media NetworkIMO (1)International Maritime Organization, part of UNIMO (2)In My Opinion (Internet)IMS Integrated Maritime SurveillanceIMSA International Municipal Signal AssociationIMSP Internet Message Support ProtocolIMTS Improved Mobile Telephone SystemIN (1)Intelligent NetworkIN (2)Indian NavyIN (3)Intelligencein inchINA Iraqi News AgencyIND India (country code)indiv individual(s)INEFC Interagency National Emergency Fire CacheINFOSEC Information systems securityING International Notification Group(of IRAC)inHg inch of Mercury (air pressure)INMARSAT Intl. Maritime Satellite Org, a consortium, leases bandwidth on Marecs, Intelsat, Marisat for ship use.INMARSAT-A Inmarsat mobile voice/data terminalINMARSAT-B Improved version, replaced AINMARSAT-C Data-only INMARSAT terminal, also for SAFETYnetINMARSAT-E INMARSAT EPIRBINMARSAT-M INMARSAT terminal, voice only, not GMDSS-compliantINO Indian Ocean (MWARA)InP Indium PhosphideINS (1)Immigration & Naturalization Service (US, now part of ICE)INS (2)Inertial Navigation SystemINS (3)Indonesia (country code)INS (4)Internal Non-Hostile Structured threatINSCOM US Army Intelligence and Security CommandINT (1)Interrogative (precedes a question)INT (2)InternationalINT (3)Interrupted (transmission)INT (4)Interrupt (computer processing)intel IntelligenceINTELCAST Intelligence BroadcastINTELNET Intelligence NetworkInternet Global interconnection of regional nets using TCP/IPInterNIC Internet Network Information CenterINTERPOL International Criminal Police OrganizationIntl International, internalINU Internal Non-Hostile Unstructured threatIOC Index of co-operation (a fax parameter)IOD Issue Of Data (DGPS)IOM Installation, operation and maintenanceIONCAP IONospheric Communications Analysis and Prediction, original prediction algorithm, still usedIOR Indian Ocean RegionIOS Indian Ocean Station (NASA)IP Internet ProtocolIPA Intermediate power amplifierIPB Intelligence Preparation of the BattlefieldIPCP Internet Protocol Control ProtocolIPF Intelligence Processing FacilityIPI Intelligent Peripheral InterfaceIPIR Initial Photo Interpretation ReportIPIX Interface Processor for Imagery ExchangeIPL Image Product LibraryIPng IP next generationIPS (1)Inches per secondIPS (2)Ionospheric Prediction Service (Australia, original name for space weather agcy)IPSec Internet Protocol SecurityIPSS International Packet SwitchStream, now GNS (UK)IPT Integrated Program TeamIPX Internetwork Packet Exchange (Novell)IQ In-phase/Quadrature (analyzer plot)IQSY International Year of the Quiet Sun, 1960's research intervalIR (1) InfraredIR (2) Instrument route (numbered military training route)IRA International Reference AlphabetIRAC Interdepartment Radio Advisory Committee (part of US NTIA)IRBM Intermediate Range Ballistic MissileIRC (1)International Reply CouponIRC (2)Internet Relay Chat, world's primo time wasterIRC (3)International Red CrossIRC (4)Incrementally Related Carrier (CATV channel scheme)IRC (5)International Record CarrierIRCA International Radio Club of AmericaIRCCM Infrared Counter-CountermeasuresIRCM Infrared CountermeasuresIRE Institute of Radio Engineers, now IEEEIRI Ionospheric Research Instrument, transmitter part of HAARPIRINT Infrared intelligenceIRIS Improved Radio Ionospheric SounderIRL Ireland (country code)


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IRN Iran (country code)IRQ (1)Interrupt request (computer hardware)IRQ (2)Iraq (country code)IRRM Image Recording Request MessageIRRS Italian Radio Relay ServiceIRS (1)Information Receiving Station (SITOR)IRS (2)Internal Revenue Service (US)IRS (3)Infernal Revenue Service (U$)IRSS Infrared Surveillance SystemIRST Infrared Search and TrackIS (1)Interval signalIS (2)Intermediate Standard, formerly RSIS (3)Information SystemIS-136 ANSI-136 multiple access standardISA (1)Industry Standard Architecture (PC-AT bus)ISA (2)In-Session Activation (telco)ISABPS Integrated Submarine Automated Broadcast Processor SystemISAM Indexed Sequential Access MethodISARC Intelligence, Surveillance, and Reconnaissance CellISB (1)Independent SidebandISB (2)Intermediate Staging BaseISC Initial Scope Command (phase I)ISD Inverted Scanning Direction (radiofax)ISDL ISDN Digital Subscriber LineISDN Integrated services & data network (telco)ISEC Information Systems Engineering CommandISF International Science FoundationISI Inter-Symbol InterferenceISM Industrial, Scientific, Medical (RF devices)ISMLS Interim Standard Microwave Landing SystemISO (1)International Organisation for StandardisationISO (2)International Organizations for StandardizationISODE ISO Development EnvironmentISP Internet service providerISR In-System ReprogrammableISS (1)Information Sending Station (SITOR)ISS (2)International Space StationISSO (1)Information System Security OfficerISSO (2)Information Systems Security Organization (US)ISTR I Seem To RecallIT (1)Information TechnologyIT (2)Information Technology Directorate (FEMA) ITA International Telegraph AlphabetITA1 International Telegraph Alphabet #1 (Old cablegrams, obsolete)ITA2 International Telegraph Alphabet #2 (Baudot double-shift)ITA3 International Telegraph Alphabet #3 (7-bit ARQ)ITA4 International Telegraph Alphabet #4 (FM VFT)ITER Improved Triple Ejector RackITFS Instructional Television Fixed ServiceITO Installation transportation officeITS (1)Institute for Telecommunication SciencesITS (2)Intelligent Transportation SystemsITU International Telecommunications UnionITU-R M.493-6 - Protocol for maritime Digital Selective Calling ITU-R ITU Sector for Radiocommunications, old CCIRITU-T International Telecommunications Union - Telecommunication Standardization SectorITU-T ITU Sector for Telecommunications, old CCITTITU-TSS ITU Telecommunications Standards Section, old CCITTITWS Integrated Terminal Weather SystemIUGG International Union of Geodesy and GeophysicsIUSS Integrated Undersea Surveillance SystemIUWDS International Ursigram and World Days ServiceIVAS Inward Voice Activated Services (telco)IVCS Integrated Voice Communication SystemsIVTT Integrated VERDIN Transmit TerminalIW Information WarfareIWS Information Warfare SquadronIWTS Integrated Terminal Weather SystemIXS Information Exchange Systemj VectorJ/S Jamming to signal ratioJ2 Intelligence directorate at a joint headquartersJ2B Single sideband, suppressed carrier tone teleprinting (emission)J3E Single sideband, suppressed carrier AM radiotelephony (emission)J4 Logistics directorate at a joint headquartersJAA Joint Aviation Authorities (Europe)JAFO Just Another F[ine] ObserverJAG Judge Advocate GeneralJALBTCX Joint Airborne Lidar Bathymetry Technical Center of ExpertiseJAN Joint Army/Navy (spec)JANA Jamahiriyah News AgencyJANET Joint Academic NETwork (UK)JAR Joint Aviation Requirements (Europe)JASORS Joint Advanced Special Operations Radio SystemJATACS Joint Advanced Tactical Command and Control SystemJATCC Joint Air Traffic Control CenterJAWS Juneau Airport Wind SystemJAWSAT Joint Air Force-Weber State University SatelliteJCS Joint Chiefs of StaffJCSE Joint Communications Support ElementJDF Japanese Defense ForceJDISS Joint Deployable Intelligence Support SystemJEDEC Joint Electronic Device Engineering CouncilJeep Believed from "General Purpose" military vehicle, now a tradenameJFC Joint force commanderJFET Junction Field-Effect TransistorJIATF-E Joint Interagency Task Force, East (incorporates JTF-4)JIATF-S Joint Interagency Task Force, South (inc. JTF-6)JIATF-W Joint Interagency Task Force, West (inc. JTF-5)JIC Joint Information CenterJINTACCS Joint Interoperability of Tactical Command and Control SystemsJIT Just In Time (JAVA Compiler, proprietary to Sun)JITC Joint Interoperability Test Command (US)JIVE Jamming and Interception Vulnerability EstimatorJJ (1)Joprep Jiffy (obsolete SAC weather report form)JJ (2)Transmission is in JapaneseJJY Japanese standard frequency & time station [~]JMC (1)Joint movement centerJMC (2)Jamaica (country code)JMPA Joint Military Postal AgencyJMRO Joint medical regulating officeJN Japanese NavyJOPES Joint Operations Planning and Execution SystemJOPREP Joint Operations ReportJORN Jindalee Operational Radar Network (Australian OTH-B)JORN Jindalee OTH Radar NetworkJOSAC Joint Operational Support Airlift CenterJOTS Joint Interoperability Targeting SystemJOVIAL Jules' Own Version of the International Algebraic Language, once used by USAFJP (1)Joint publicationJP (2)Jumper (connection)JP4 Jet Propulsion #4 (military jet fuel)JPATS Joint Primary Aircraft Training SystemJPEG Joint Photographic Experts Group (lossy compression for pictures)JPL Jet Propulsion Laboratory, CA (NASA)JPNIC Japanese Network Information CenterJRCC Joint Rescue Coordination CenterJRTC Joint Readiness Training Center (Ft. Polk, LA)


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JSC Johnson Space Center, TXJSC Joint Spectrum CenterJSF Joint Strike FighterJSMSw Joint Spectrum Management Spectrum for Windows (software)JSORS Joint Advanced Special OPS Radio SystemJSTARS Joint Surveillance Target Attack Radar System, aka "Joint STARS," E-8 surveillance aircraftJTF Joint Task Force, usually US "War on Drugs"JTF-4 Caribbean drug interdiction unit, out of Key West, part of JIATF-EJTF-5 Pacific coast drug unit, part of JIATF-WJTF-6 South & Central America drug unit, part of JIATF-SouthJTFEX Joint Task Force ExerciseJTIDS Joint Tactical Information Distribution SystemJTRS Joint Tactical Radio SystemJU JTIDS Unit (net member, like a "PU" in Link-11)JUH-MTF Joint user handbook for message text formatJWICS Joint Worldwide Intelligence Communications SystemK Index Logarithmic, 3-hourly geomagnetic activity readingK (1)1024 (decimal) of anything (loosely from hexadecimal)K (2)CW prosign: "Go Ahead," technically an "Invitation To Transmit"k A thousand of anything, in decimal (short for kilo)k/c KilocyclesK/cs Kilocycles per second = kiloHertzKA9Q Packet radio protocol, from callsign of its inventor [~]KAM Kantronics All-Mode (packet/digital controller)KAWN Identifier attached to AWN weather products, as relayed by several HF stationsKB KeyboardkB Kilobit, kilobaudkb/s kilobits per secondKBD KeyboardkBd KilobaudKbps Kilobits per secondKBS Korea Broadcasting Systemkc Kilocycles per second, now kHertzKCAS Knots Calibrated Air SpeedKCNA Korean Central News Agencykcs Kilocycles per second, now kHertzKDU Keypad-Display UnitKGB Komitet Gossudarstwennoy Besopasnostij (transliterated from Russian by Klingenfuss), old USSR comint, replaced by FAPSIKH Keyhole, optical recon satellite, KH-12 resembles HubblekHz KiloHertzKIPM Illuminati Primum Materium (Pirate)KISS Keep it simple, stupid (packet radio mode/engineering golden rule)km kilometerkMc kilo-Megacycle, now GigaHertzknot Nautical mile/hour [~]KNRM Koninklijke Nederlandse Redding Maatschappij (Dutch SAR org.)KOR (South) Korea (country code)Kp Planetary K indexkph kilometer per hourKRE (North) Korea (country code)KSC Kennedy Space Center, Cape Canaveral, FLKSCPAO Kennedy Space Center Public Affairs Office (NASA)ksh Korn shell (Unix)KSR Keyboard Send-Receivekt knot (nautical mile per hour)KT knotsKTS knotsKu-band 12-18 GHz microwave bandkV KilovoltKVA KiloVolt-Amp(s); can <> kW in highly reactive circuitkW KilowattL Inductance (in Henrys)L left (with reference to runway designation)L2TP Layer 2 Tunneling ProtocolLA Low altitudeLadar Laser RadarLAHSO Landing And Hold Short OperationsLAN Local Area NetworkLANL Los Alamos (NM) National LaboratoryLANTAREA USCG Atlantic AreaLANTIRN Low Altitude Navigation and Targeting Infra Red for NightLAO Laos (country code)LAPD (1)Link Access Procedure D-ChannelLAPD (2)Los Angeles Police DepartmentLAPM Link access protocol for modemsLASER Light Amplification by Stimulated Emission of RadiationLAST last observation before a break in coverage at a manual stationLAU Launcher Adapter UnitLBA Logical Block Addressing (Disk access)LBAR Limited area BARotropic (NCEP weather model)LBN Lebanon (country code)LBR Liberia (country code)LBY Lybia (country code)LC Limited Coastal (service)LCA St. Lucia (country code)LCAC Landing Craft, Air-Cushioned (large hovercraft)LCC Launch Control CenterLCD Liquid Crystal DisplayLCMP Atlantic Composite BroadcastLCP Link Control Protocol (PPP)LCS Limited Coastal StationLCU Landing Craft, Utility (US Army)LDAP Lightweight Directory Access ProtocolLDF Lightweight digital facsimileLDOC Long Distance Operational Control (civil aviation)LDP Landing Decision PointLDR (1)Low Data RateLDR (2)LoaderLDTWA Long Dual Trailing Wire Antenna (TACAMO)LEARN Law Enforcement Amateur Radio NetworkLEASAT Leased Satellite (US military comm)LED Light Emitting DiodeLEO Low Earth Orbit ("Little LEO" = a data satellite)LES Land Earth StationLF (1)Low Frequency (30-300 kHz)LF (2)LinefeedLFO Low frequency oscillatorLG Logistics GroupLGTR Laser Guided Training RoundLHCP Left-hand circular polarizationLIAR Liar Imitates Apply Recursively (recursive)Lidar Light Detection & Ranging (light "radar")LIE Liechtenstein (country code)LIM (1)Lotus/Intel/Microsoft, original spec for PC extended memoryLIM (2)Line interface moduleLINCOMPREX Link Compression and Expansion, an ACSB systemLinux "Linus' Unix," open source shareware version of UnixLIRL Low Intensity Runway LightsLL Landline, "Lima Lima"LLC (1)Logical Link ControlLLC (2)Limited Liability Corporation (US)LLCC Low Level Cloud Center (wx obs)LLNL Lawrence Livermore National LaboratoryLLP Limited Liability Partnership (US)LLWAS Low Level Wind Shear Alert SystemLMAO Laughing My A-- Off (Internet)LMCC Land Mobile Communications CouncilLNB Low Noise amplifier/Block downconverter


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LNBF Low Noise amplifier/Block downconverter Feedhornln Natural logarithmLNP Local Number Portability (cell phones)LO Local oscillator (of a receiver)LOC (1)lines of communicationLOC (2)locationlog Common logarithmLOGCAP Logistics Civil Augmentation ProgramLOGPAC Logistics packageLOI Low Opportunity of InterceptLOJACK Vehicle locator beacon activated & DF'd by policeLOL Laughing Out Loud (internet)LORAC Long Range Accuracy (NASA booster recovery)LORAN Long Range NavigationLORAN-A Discontinued 160m Loran systemLORAN-C 100 kHz Loran systemLORAN-D Military Loran systemLOS (1)Loss Of SignalLOS (2)Line of sightLOTS logistics-over-the-shoreLOWFER Low-Frequency Experimental Radio (~164-190 kHz)LP (1)Long Playing (old records)LP (2)Low pass (filter circuit)LP (3)Linking Protection (US mil ALE security)LP (4)Log Periodic (antenna)LPB Logistics preparation of the battlefieldLPD Line Printer DaemonLPDA Log Periodic Dipole ArrayLPDU HDFL: Link Protocol Data UnitLPFM Low-Power FM (broadcasting)LPI Low Probability of InterceptLPM Lines per minuteLPR Line PrinterLPRS Low-Power Radio Service (FCC)LPT Logistics preparation of the theaterLPTV Low-Power TV (broadcasting)LPVA Log Periodic V ArrayLQA Link Quality Analysis (databursts heard from ALE radios)LR Last Received (message)LRA Landing Rights AirportLRC (1)Longitudinal Redundancy Check (computing)LRC (2)Logistics and Readiness CenterLRCOC Long Range Company Operational ControlLS Last Sent (message)LSASS Local Security Authority Subsystem Service (Windoze)LSB (1)Lower SidebandLSB (2)Linux Standard BlockLSB (3)Least Significant Bit/ByteLSDIS Light and Special Division Interim Sensor (US Army)LSE Logistics support elementLSI (1)Large scale integration (of chips)LSI (2)Locomotive System IntegrationLST (1)Landing ship, tankLST (2)Local Standard TimeLSV Logistic Support Vessel (US Army)LTG lightningLTR Letter(s)LTRS Letters case (Baudot lower case)LUF Lowest Usable Frequency (varies with path)LUT Local User TerminalLUU Parachute FlareLWR lowerLZW Lempel-Ziv-Welch, lossless compression algorithm for dataM (1)Mega, meg, a million of anything, or 1,048,576 bytes (hex)M (2)minus, less thanM (3)Below zero CM (4)Statute Milem Meter (39.37 inches)M/S (1)Motor Ship (also MS, M.S.)M/S (2)Mile per secondm/s Meter per secondM/V Motor Vessel (also m/v)m/v Motor Vessel (also MV)M1FC Model 1 Full Capacity (Air traffic control)mA milliamperesMAC (1)Military Airlift Command, now AMCMAC (2)Medium Access Control (computer networks)Mac Macintosh (computer)MACOM Major commandMacTCP TCP/IP package for MacintoshMAFFS Modular Airborne Fire Fighting System (tank for C-130)MAFOR Maritime weather forecastMAGIS Marine Air-Ground Intelligence SystemmAh miliamp-hour(s)MAIT Major Accident Investigation Team (CHP)MAN Metropolitan Area Network, halfway between a LAN and a WANMANPAD Man-Portable Air DefenseMAP Maghreb Arabe PresseMAPI Mail/Messaging Applications Programming InterfaceMAPS Mail Abuse Prevention System (Internet)MARAD MARitime ADministration [~]MARC MAchine Readable CatalogMARCEMP Manual Relay Center Modernization Program (USN)MARO Maritime Air Radio OrganizationMARS (1)Military Affiliate Radio System (US)MARS (2)Maritime (mobile) Access & Retrieval System (ITU ship lookup)MARSA Military Assumes Responsibility for Separation of AircraftMARSEC Marianas Sector (US Coast Guard) [~]MASER Microwave Amplification by Stimulated Emission of RadiationMASH mobile army surgical hospital, may be obsoleteMASM Macro-Assembler (computer code)MATIC Mobility Assessment Test and Integration CenterMATS Military Air Transportation Service, became MAC, now AMCMAU Media Attachment Unit, a network transceiverMAVICA Magnetic Video CameraMAYDAY Prosign: Distress traffic follows; repeated 3 times [~]MB Megabytemb millibarMBCS (1)Multi Byte Character Set (Unicode)MBCS (2)Magnetic Bridge Current SensorMBDL Missile Battery Data LinkMBKS Multi-Button Key Set (telco)MBO MailboxMBONE Multicast BackboneMbps Megabytes per secondMBR Master Boot Record ("boot sector")MCA Movement control agencyMCC Master Control CenterMCC Movement control centerMCFB Multi-Channel Fleet BroadcastMCM Mine CountermeasuresMCP (1)Mobile communications packageMCP (2)Multimode Communications Processor (packet)MCP (3)Male chauvinist pigMCS Mission Communications SystemMCS/P Maneuver Control System/Phoenix (US Army)MCVFT Multichannel Voice Frequency Telegraph (multiplex RTTY)MDR Medium Data Rate


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MDS Multipoint Distribution ServiceMDT (1)Mobile Data Terminal (usually police)MDT (2)Mountain Daylight Time, US zone includes Rockiesmed medicalMEDAFS Mine Warfare Environmental Data Analysis and Fusion SystemMEDCOM Medical commandMEDFER Medium-frequency Experimental Radio (low power ~510-1710 kHz)MEDICAL Voice prosign attached to c/s of vessel with emergency medical supplies or patients, pronounced MAY-DEE-CALMEDICO Emergency Medical CommunicationsMEDLOG Medical logisticsMEL Maximum Elevation (of a spacecraft)MEMA Massachusetts Emergency Management AgencyMEOW (1)Maximum Envelope of WaterMEOW (2)Maximum Envelope of WindsMER-# Mars Exploration Rover # (NASA)MERCAST MERchant ship broadCASTMEROD Message Entry and Read Out Device (Thales-Racal, see RAC-ARQ)MERS Mobile Emergency Response Support (FEMA)Messenger Mercury Surface, Space Environment, Geochemistry and RangingMet Office Weather office at a baseMET MeterologicalMETAR Meteorological observation code for routine aviationMETAREA Meteorological Area, same as a NAVAREA (see WMO)METARS Plural of METARMeteo MeteorologicalMETOC Meteorological and Oceanographic Centre (Halifax, NS)Metro Meteorological officeMETSAT Meterological SatelliteMF (1)Medium Frequency (300-3000 kHz)MF (2)Multifrequencymf MicrofaradMFA Ministry of Foreign AffairsMFD Modulated Fractional DivisionMFM Modified Frequency Modulation (Miller Coding)MFSK Multiple Frequency Shift Keyingmgt managementmH MillihenryMHD Magnetohydrodynamics; behavior of plasmas in magnetic fields, such as the ionosphere and sunspotsMHE materials-handling equipmentMHFCS Australian Modernised HF Communication SystemMHS Message Handling SystemMHz MegaHertzMI (1)Military intelligenceMI (2)shallowmi mile (1.6 km)MI5 Directorate of Military Intelligence, group 5 (UK domestic)MI6 Directorate of Military Intelligence, group 6 (UK foreign, aka SIS)MIB Management Information BaseMICR Magnetic Ink Character Recognition (as used by banks)MICS Medical Implant Communications ServiceMID (1)Middle East (MWARA)MID (2)Maritime Identification Digits, country code prepended to MMSIMIDI Music Industry Digital InterfaceMIDS Multifunctional Information Distribution SystemMIFG Shallow FogMIJI Meaconing, Intrusion, Jamming & Interference ("Jammer writeup")Mil (1) MilitaryMil (2) MilliampereMIL-188-110A NATO standard for single-tone modemsMIL-188-141A NATO standard for ALE controllersMIME Multipurpose Internet Mail Extensions, allows attachment of binaries to ASCII text lettersMIMS Medical Information Management Systemmin MinuteMINIMUF Miniature Maximum Usable Frequency calculator, classic BASIC MUF prediction algorithmMINREX Ministerio de las Relaciones Exteriores (Cuban news agency)MIR Not an acronym; transliteration of Russian for "Peace"MIREX Mir Experiment, amateur robot packet station on MirMIRL Medium Intensity Runway LightsMIS Management Information SystemsMISDN Mobile ISDNMISR Multi-angle Imaging SpectroRadiometer (Terra satellite)MIT Massachussetts Institute of TechnologyM-JPEG JPEG used for moving pictures (cf JPEG, MPEG)mkr MarkerML Machine language, how computers store instructionsMLB (1)Motor LifeboatMLB (2)Magnetic Longwire BalunMLM Marine Location MarkerMLS Microwave Landing SystemMLSE Maximum Likelihood Sequence EstimatorMLSO Mauna Loa Solar ObservatoryMLT Magnetic Local TimeMM Maritime mobilemm MillimeterMMC (1)materiel management centerMMC (2)Microsoft Management Consolemmf micro-microfarad, changed to picofaradMMS Maritime Mobile ServiceMMSI Maritime Mobile Service Identity (code for DSC)MMX Multimedia extensions (microprocessor architecture)MNCS Master Net Control StationMNP Modem Network ProtocolMOA Military Operation AreaMOAB Massive Ordnance, Air BlastMob MobileMOC (1)Mission Operation CenterMOC (2)Ministry Of Commerce (Canada)MOC MERS Operations Center (FEMA nested acronym)MOCA Minimum Obstruction Clearance AltitudeMoD Ministry of Defence (UK)MOD Mobile Offshore Drilling Mod Modification (to radio)Mode A SITOR-A (ARQ)Mode B SITOR-B (FEC)Modem Modulator/DemodulatorMODIS Moderate Resolution Imaging Spectroradiometer (Terra satellite)MODU Mobile Offshore Drilling UpdateMOI Ministry Of InformationMOOTW Military operations other than warMOP (1)Measure Of PerformanceMOP (2)Ministry Of PetroleumMOPP mission-oriented protection posture (0-4, 4 being full suit)MOS (1)Metallic Oxide SiliconMOS (2)Mitoudt Sound, shooting film with a silent cameraMOSAIC Multifunctional On-the-move Secure Adaptive Integrated CommunicationsMOSFET MOS Field Effect TransistorMOSS MIME Object Security ServicesMOTD Message Of The DayMOTIS Message Orientated Text Interchange Service, ISO version of MHSMOV moved/moving/movementMOX Manually Operated SwitchingMOZ (1)Mozambique (country code)MOZ (2)Mozilla (computer browser)MP (1)Military Police (US)MP (2)Member of Parliament (UK)MP (3)Multiprocessor (computer h/w)MP MagnetopauseMP2 MPEG-1 Level 2, replaced by MP4


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MP3 MPEG-1 Level 3, CD-quality compression schemeMP4 MPEG-1 Level 4, audio/video compressorMPDU HFDL: Media access Protocol Data UnitMPEG Motion Picture Expert Group, lossy compression for videoMPG (1)File extension: MPEG videoMPG (2)Miles Per Gallonmph mile per hourMPSA Military Postal Service AgencyMPSAP Mobile Public Safery Answering PointMPX MultiplexMR MagnetoresistiveMRB Marine Radio BeaconMRC (1)Mobile Radio CommunicationsMRC (2)Morocco (country code)MRCC Maritime Rescue Coordination CenterMRE Meal, Ready-to-EatMRF Medium Range Forecast (NCEP)MRO medical regulating officeMRS Mountain Radio ServiceMRSC Maritime Rescue Sub-CenterMRS MPA Medium Range Surveillance Maritime Patrol AircraftMRT (1)Mountain Rescue TeamMRT (2)MauretaniaMRU Most Recently UsedMS Master Stationms millisecondmS millisiemenMS (1)Motor ShipMS (2)Meteor ScatterMS-188 MIL-STD-188, Military telecom standardsMSB (1)Most Significant Bit/ByteMSB (2)Main Support BattalionMSC Military Seaflift Command (US)MSE (1)Mobile Subscriber EquipmentMSE (2)Mean Square ErrorMSF (1)English standard frequency & time stationMSF (2)Medicins Sans Frontiers (Doctors Without Borders)MSFC NASA Marshall Space Flight Centermsg MessageMSI (1)Maritime Safety InformationMSI (2)Marine Safety InformationMSIS Mass Spectrometer Incoherent Scatter (research)MSK Minimum Shift KeyingMSR (1)main supply routeMSR (2)Mobile Sea Range MSS Mobile Satellite ServiceMST (1)Mountain (US) Standard Time, zone includes RockiesMST (2)Maintenance support teamMT (1)Monitoring Times (**the bible**)MT (2)mountain(s)MT (3)Mitigation Directorate (FEMA) MTA (1)Message Transfer AgentMTA (2)Metropolitan Transit AuthorityMTADS Multi-sensor Towed Array Detection SystemMTBF Mean Time Before FailureMTF medical treatment facilityMTI Moving Target IndicatorMTMC Military Traffic Management Commandmtr Meter, either distance unit or measuring deviceMTTR Mean Time To RepairMTU Maximum Transmit Unit (TCP/IP packet length)MUF Maximum Usable Frequency (varies with path)MULTICS Multiplexed Information and Computing Service; Unix precursorMung (1) Verb: to Mash Until No GoodMung (2) Verb: to Mung Until No Good (recursive acronym)MURS Multi-Use Radio ServiceMUX Multiplex, multiplexermV MillivoltMV Motor VesselMVS Multiple Virtual Storage (large IBM computers)MW (1)Medium Wave (typically 530-1710 kHz)MW (2)MegaWattmW MilliWattMWARA Major World Air Route AreaMWP Meteorologist Weather ProcessorMWR Morale, welfare, and recreationMX Mail Exchange Recordmx MusicMYA Myanmar (Burma;country code)MYM My Mailbox (packet)MYP Personal Mailbox (packet)N No ChangeN northN/A not applicableN0N Unmodulated, steady carrier, old "A0"NA (1)North AmericaNA (2)Not applicable, N/ANA Not authorizedNAAS Naval Auxiliary Air StationNAB (1)National Assn of BroadcastersNAB (2)Naval Amphibious Base, USN, Coronado, CA (SEALs train there)NABA North American Broadcasters Assn.NABER National Association of Business/Emergency RadioNACES Naval Aircrew Common Escape SystemNAD 83 North American Datum of 1983NADC Naval Air Development CenterNADEP Naval Air DepotNADGE NATO Air Defence Ground EnvironmentNAEC Naval Air Engineering CenterNAF Naval Air Facility (US)NAFB National Assn of Farm BroadcastersNAK Negative Acknowledgment (error in received data, ASCII 21d)NALF Naval Auxiliary Landing FieldNALO Naval Air Logistics OfficeNAM Number Assignment Module (Cellular)NANP North American Numbering Plan (telco)NAOC National Airborne Operations Center, aka Nightwatch, old NEACPNARTE Natl Assn of Radio & Telecommunications EngineersNARTEL North Atlantic RadiotelephoneNAS (1)Naval Air StationNAS (2)National Academy of Sciences (US)NAS (3)National Airspace SystemNASA (1)National Aeronautics and Space AdministrationNASA (2)National Acronym Slinging AgencyNASTD National Association of State Telecommunications DirectorsNAT (1)North Atlantic (MWARA)NAT (2)Network Address TranslationNATC Naval Air Test CenterNATO North Atlantic Treaty OrganizationNATOPS Naval Air Training and Operating Procedures Standardization NAV NavigationNAV/COMM Airplane Navigation/Communication radioNAVAID Navigational aidNAVAIR Naval Air Systems CommandNAVAREA Navigational Area (IMO/IHO)NAVCEN USCG Navigation Center, VANAVCOMMAREA Naval Communication AreaNAVCOMPARS Naval Communications Processing and Routing System


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NAVCOMMSTA Naval Communications StationNAVCOMTELCOM Naval Computer and Telecommunications CommandNAVMARCORMARS Navy/Marine Corps Military Affiliate Radio Service (US)NAVMTO Navy Material Transportation OfficeNAVRADTRANSFAC Navy Radio Transmitter FacilityNAVSAT NAVigation SATelliteNAVTEX Navigational Telex, Navigational Text (518 kHz SITOR-B)NAWAS National Warning System NAWC Naval Air Warfare CenterNAWCAD Naval Air Warfare Center Aircraft DivisionNAWC-WPN Naval Air Warfare CenterNAWS (1)Naval Air Weapons StationNAWS (2)Old group call: Notice to Allied WarshipsNB (1)NarrowbandNB (2)Noise blankerNBC (1)Nuclear, Biological, Chemical (warfare)NBC (2)National Broadcasting CompanyNBDP Narrowband direct printing (RTTY)NBDPT Narrowband direct printing telegraphyNBF NetBIOS FramesNBFM Narrowband frequency modulationNBR Narrowband ReceiverNBS National Bureau of Standards, now NISTNBSV Narrowband Secure VoiceNBSVS Narrowband Secure Voice SystemNC (1)No ConnectionNC (2)Normally ClosedNC3A NATO Consultation, Command and Control Agency (Nested acronym!)NCA (1)North Central Asia (MWARA)NCA (2)National Command Authorities, US nuclear "button"NCAR National Center for Atmospheric Research, CONCC National Coordinating Center for Telecommunications (US NCS)NCCOSC Naval Command, Control and Ocean Surveillance CenterNCCS Navy Command and Control SystemNCDC National Climatic Data CenterNCEM National Coordinating Council for Emergency Management, now IAEMNCEP National Center for Environmental PredictionNCFSK Non-Coherent Frequency Shift KeyingNCG Nicaragua (country code)NCIC National Crime Information Center, US database of police recordsNCIS Naval Criminal Investigative ServiceNCO Non-Commissioned OfficerNCPi Netware Core ProtocolNCR (1)National Capital Region (US)NCR (2)National Cash RegisterNCS (1)National Communications System, US governmentNCS (2)Net Control StationNCS (3)Naval Communications StationNCS (4)Network Coordinating StationNCSA National Centre for Supercomputing Applications, developed Mosaic web browser, which became Netscape (Mozilla)NCTAMS Naval Computer and Telecommunications Area Master StationNCTS Naval Computer and Telecommunications SystemNCTSI Navy Center for Tactical Systems Interoperability (US)NCWF National Convective Weather ForecastND NondirectionalNDB Nondirectional beaconNDIS Network Driver Interface SpecificationNDMS National Disaster Medical SystemNDRS National Distress and Response SystemNDRSMP National Distress and Response System Modernization ProjectNDS NUDET Detection System, see NUDETNE NortheastNEACP National Emergency Airborne Command Post, "kneecap," now NAOCNECC National Emergency Coordination Center (FEMA) NECN National Emergency Coordination NetworkNERC North American Electric Reliability Council (bulk power delivery)NERK Old CW group call, obsoleteNESDIS National Environmental Satellite, Data and Information ServiceNESP Navy EHF Satellite ProgramNEST Nuclear Emergency Search Team ("Flynest")NET/ROM Network packet radio protocolNetBEUI NetBIOS Extended User InterfaceNetBIOS Network Basic Input/Output SystemNEXRAD Next generation of (weather) Radar NFCB National Federation of Community Broadcasters (US)NFCC National Frequency Coordinators' CouncilNFO Naval Flight Officer (same as RIO)NFR Navy Fleet Relay (USN secure satcom)NFS Network File SystemNFWS Navy Fighter Weapons SchoolNGA National Geospatial-Intelligence Agency (ex-NIMA)NGLT Next Generation Launch TechnologyNGO (1)Nongovernmental organizationNGO (2)Near-Geosynchronous OrbitNGO (3)Naval Gunnery OfficerNHC National Hurricane Center, i.e. TPCNHK Nihon Hoso Kyokai , Japanese public broadcast co.NIC (1)Network Interface CardNIC (2)Network Information CenterNiCad Nickel Cadmium (battery)NiCd Nickel Cadmium (battery)NICP National inventory control pointNIEX No-Notice Interoperability Exercise (NATO)NIFC National Interagency Fire Center (US forest fire resources)NIFTP Network Independent File Transfer ProtocolNIL CW prosign: "No traffic" or "I copy nothing"NIMA National Imagery and Mapping Agency (now NGA)NIMBY Not In My Back Yard (place people want radio towers)NiMH Nickel-metal hydride (battery)NiMh Nickel-Metal-Hydride (battery)NIMS Naval Ionospheric Measuring System (UK)Niner Number nine, to distinguish from five [~]NIPRNET Non-Classified Internet Protocol Router Network (military's own Internet, with SIPRNET)NIS Network Information SystemN-ISDN Narrow Band-Integrated Services Digital Network N-ISDN Narrowband ISDNNISO National Information Standards Organisation (US)NISP Networked Information Services Project (UK)NISS National Information on Software and Services (UK)NIST National Institute of Standards & Technology (old NBS)NLM Netware Loadable Module (extension of Novell Netware)NLSP Netware Link Services ProtocolNm (1)Nautical Mile(s)Nm (2)NanometerNM Nautical Mile(s) nm Nautical Mile(s); about 1.24 statute miles(1.85 km)NMA US Coast Guard COMMSTA, Miami, now controlled from CAMSLANTNMC (1)National Meteorological CenterNMC (2)Call of US Coast Guard CAMSPAC Pt Reyes, CANMC (3)Naval Missile Center NMEA National Marine Electronics AssnNMF US Coast Guard COMMSTA, Boston, will be ctld from CAMSLANTNMG US Coast Guard COMMSTA, New Orleans, remote from CAMSLANTNMN US Coast Guard CAMSLANT Chesapeake, VANMO US Coast Guard COMMSTA, HonoluluNNCC National Network Control Center (FAA)NNE North-northeastnnnn RTTY/Telex ending characters


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NNR National Nature ReserveNNTP Network News Transfer Protocol (USENET)NNW North-northwestNO Normally OpenNOAA National Oceanic & Atmospheric AdministrationNOC (1)Network Operation CenterNOC (2)Non-Official Cover (now "OGA")NOE Nap-Of-the-Earth (low altitude attack)NOGAPS Navy Operational Global Atmospherics Prediction SystemNOI Notice Of Inquiry (FCC rulemaking)NOIWON National Operations Intelligence Watch Officers NetNOJ US Coast Guard COMMSTA, KodiakNOMTS Naval Ordnance Missile Test CenterNORAD North American Aerospace Defense CommandNORAPS Navy Operational Regional Atmospherics Prediction SystemNORDO (1)No RadioNORDO (2)Aircraft has no radio (uses visual signals to tower)NORLANT North Atlanticnorm normalNOS (1)Amateur version of TCP/IP (Internet protocols)NOS (2)National Ocean ServiceNOS (3)Network Operating SystemNOS (4)New, Old-Stock (wine or vacuum tubes)NOSC Naval Ocean Systems Center, San Diego, CA, now NCCOSCNOSIG No Significent WeatherNOSPECI no SPECI reports are taken at the stationNOTAM Notice to AirmenNP North Pacific (MWARA)NPA Notice of Proposed AmendmentNPN Negative/Positive/Negative; transistor typeNPR National Public Radio (US)NPRM Notice of Proposed Rule Making (FCC)NPS National Park Service (US)NPSC National Process Serving Center (FEMA)NPSTC National Public Safety Telecommunications CouncilNRaD Naval Research and Development (US)NRAO National Radio Astronomy ObservatoryNRC (1)National Radio ClubNRC (2)Nuclear Regulatory Commission (US)NREN National Research and Education Network, faster Internet successor for research sitesNRI Net radio interfaceNRK Norsk Rikskringkasting (Denmark broadcast co.)NRL Naval Research Laboratory (US)NRN National Radio News (Australia)NRO National Reconnaissance Office (operates US spy satellites)NRS Nordic Radio SocietyNRT Navigation Response TeamNRV US Coast Guard COMMSTA, Guam, controlled from CAMSPACNRWATS Naval Rotary Wing Aircraft Test SquadronNRZ Nonreturn to ZeroNRZL Return To Zero LevelNRZM Nonreturn To Zero MarkNRZS Nonreturn To Zero SpaceNS Node switchNS/EP National Security/ Emergency PreparednessNSA (1)National Security Agency (US intercept and crypto)NSA (2)No Such Agency (NSA used to "not exist")NSA (3)Never Say Anything (NSA secrecy policy)NSAP Network Service Address PointNSAWC Naval Strike and Air Weapons Center (replaces "Top Gun")NSAWC Navy Strike Aircraft Weapons CenterNSE National Support ElementNSF National Science Foundation (US)NSFNET National Science Foundation Network, old Internet backboneNSK Narrowband shift keyingNSS Navigation Safety SystemNSTAC National Security Telecommunications Advisory Committee (US)NSU Network Server UnitnT Nanotesla (unit of magnetic flux=1nWeber/m)NT Not TestedNTA (1)National Telecommunications Alliance (NCS)NTA (2)National telecom administration (ITU member bodies)NTC National Teleregistration Center (FEMA)NTCC Naval TeleCommunications CenterNTCN National Telecommunication Coordination NetworkNTIA National Telecommunications and Information AdministrationNTM Notice to MarinersNTMS National Telecommunications Management Structure (national emergency plan)NTN NATO Track NumberNTS (1)National Traffic System, amateur message networkNTS (2)Naval Telecommunications SystemNTSC (1)National Television Standards Committee (US TV standard)NTSC (2)Never The Same Color (result of using above)NTT Nippon Telegraph and Telephone (Japanese "FCC")NUC NuclearNUCINT Nuclear IntelligenceNUCO Numerical Code (US Navy)NUDET Nuclear detonationNUKO Old group call: To All Ships Receiving MERCASTNUL Nothing (ASCII 0000)NVG Night-Vision GogglesNVIC Navigation & Vessel Inspection CircularNVIS Near Vertical Incidence SkywaveNVOAD National Voluntary Organizations Active in DisasterNVRAM Nonvolatile Random Access MemoryNW (1)CW brevity code: "Now," or "New"NW (2)NorthwestNWC Naval Weapons CenterNWCG National Wildfire Coordination Group NWEF Naval Weapons Evaluation FacilityNWR NOAA Weather RadioNWS (1)National Weather Service (US)NWS (2)Naval Weapons StationNWSFO National Weather Service Forecsting OfficeNWSOP National Winter Storm Operation Plannx NewsNYSEMO New York State Emergency Management OfficeO&O Owned & Operated (by broadcast network)o/l OnlineO/R Address Originator/Recipient AddressO/R On requestO/S Out of serviceOARNET Ohio Academic Resources NetworkOASD/C3I Office of the Assistant Secretary of Defense for command, control, communications and intelligenceOASIS Operational and Supportability Implementation System (FAA)OBC On-board computerOBS Ship weather report in standard formOCA Oceanic Control AreaOCC Operations Control Center (Centre)OCD (1)Office of Civilian Defense, obsoleteOCD (2)Operations Control DivisionOCNL occasionalOCONUS Outside Continental United StatesOCOT Office of the Chief of Transportation (US Army)OCR (1)Optical Character RecognitionOCR (2)Optically Coupled RegenerativeOCS Office of Coast SurveyOD (1)Officer of the Day


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OD (2)OverdoseOD (3)Outside DiameterODBC Open DataBase Connectivity (Microsoft)ODMA Orthogonal Domain Multiple AccessODMP Orbiter Maintenance Down Period (NASA)OE Operating ExpenseOEI One Engine InoperativeOEM Original Equipment ManufacturerOFCM Office of the Federal Coordinator for MeteorologyOFDM Orthogonal Frequency Division MultiplexOFP Operational Flight ProgramOG Operations GroupOGA Other Governmental Agencies (formerly "NOC")OHD overheadOIC Officer In ChargeOIS Organization for Internet SecurityOLAC Open Language Archives CommunityOLAP On-Line Analytical ProcessingOLF Outlying Landing Field (US Navy)OLTP On-Line Transaction Processing (IBM)OLX OLE Custom Control (MS made it up... i didn't)OM Male voice ("Old Man")OMEGA Optimized Method for Estimated Guidance Accuracy (VLF Navigation)OMF (Weather) Observation Markup FormatOMS ("ohms") Orbital Maneuvering System (NASA)OO Official Observer (Amateur)OOB (1)Out of bandOOB (2)Out Of Bounds (classic Internet hack)OOC Official Observer Coordinator (Amateur)OOK On-off keyingOOOI Out, Off, On, In (ACARS time reporting)OOP Object-Oriented ProgrammingOOW Operations Other than WarOP Observation Postop OperationOPAL Orbiting Picosat Automatic LauncherOPBAT Operations, Bahamas and Turks (see JTF)OPC (1)Ocean Prediction Center, Camp Springs, MDOPC (2)Operations CenterOPCEN Operations CenterOPCODE Operations codeOPCON Operational controlOPF Orbiter Processing Facility (NASA)OPLAN Operations planOPORD Operation orderOPSEC Operation SecurityOQPSK Offset Quadrature Phase Shift KeyingOR Offroute (unscheduled flights, usually military)ORACLE Oak Ridge Automated Computer and Logical EngineORBS Open Relay Behaviour-modification System (anti-email-spam)ORF Oesterreichischer Rundfunk (Austrian broadcasting co.)ORFM Office of Radio Frequency Managementorg organization (Internet)OS (1)Operating system (code that runs a computer)OS (2)Operations SupportOS Operations Specialist (combines older USCG RD and TC)OS/2 Operating System 2, proprietary IBM op-system for PS/2OS/2 Operating System II (IBM)OSC (1)Operations Systems Center, USCG, VAOSC (2)On-Scene CoordinatorOSC (3)Oscillator [~]OSCAR Orbiting Satellite Carrying Amateur RadioOSCE Organization for Security and Cooperation in EuropeOSCR Ocean Surface Current RadarOSEI Operational Significant Event Imagery (NOAA)OSI Open Systems Interconnection (coincidentally, OSI is by ISO)OSIR ISO's famous 7-layer "OSI Reference Model" for packetOSIRM ISO's famous 7-layer "OSI Reference Model" for packetOSPF Open Shortest Path FirstOSS Office of Special Services, WWIIOSTP Office of Science and Technology Policy (US Government)OSWER Office of Solid Waste and Emergency ResponseOTAN NATO in FrenchOTAR Over-The-Air Rekeying (crypto)OTASP Over-the-Air Service Provisioning (telco)OTCIXS Officer in Tactical Command Information Exchange SystemOTHB Over The Horizon Backscatter radarOTHR Over the horizon radarOUI Organizationally Unique IdentifierOut Voice prosign: Contact completed, going back to listeningOVC overcastOver Voice prosign: Transmission completed, go aheadOVR OvercastOWF Optimum Working Frequency, realtime version of FOTOWI Office of War Information, WW IIP greater thanP PlusP Power (in watts)P/N Part numberp/p (1)phone patchp/p (2)point-to-pointp/p (3)peak-to-peakPA (1)Power amplifierPA (2)Public address systemPA (3)Passenger agentPA (4)Privacy ActPA (5)Proceed AuthorityPAC (1)PacificPAC (2)Personnel and Administration CenterPAC (3)Political Action CommitteePAC-3 Patriot Advance Capability 3PACAF Pacific Air Force (US)PACAREA Pacific Area (USCG)PACSAT Packet radio satellitePACTOR Packet teleprinting over radio (modes 1 and 2)PAD Packet assembler/disassemblerPADAN PAcket Digital Amateur NetworkPADIL PATRIOT Digital Information Link (US missile batteries)PAL Plus 16:9 PALPAL (1)Phase Alternate Line (W. Europe TV standard)PAL (2)Positive Arm LatchesPAM (1)Phase-Amplitude Modulation, modemsPAM (2)Pulse Amplitude ModulationPAM (3)Pluggable Authentication Modules (Linux)PAN Prosign: priority safety traffic follows (also "PAN PAN") [~]PANA Pan-African News AgencyPanAmSat Pan American Satellite Co., operates 17 COMSATsPAO Public affairs officerPAP (1)Polska Agencja PrasowaPAP (2)Password Authentication Protocol, computer networksPAPI Precision Approach Path IndicatorPAR Precision Radar Approach, new name for GCAPARC Palo Alto Research Center (Xerox, obsolete)PASR personnel accounting and strength reportingPATRECONFOR Patrol and Reconnaissance Force (US Navy)PATWAS Pilot Automated Telephone Weather Answering ServicePAVE PAWS Phased array SLBM warning system, 4 US Coastal sitesPAVE Precision Acquisition Vehicle Entry


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PAWS (1)Phased Array Warning System, e.g., PAVE PAWSPAWS (2)Programmable Analyst Work StationPAWSS Ports and Waterways Safety SystemPAX (1)PassengersPAX (2)~"Peace" in Latin ("Pax Americana")PBBS Packet Bulletin Board SystemPBS Public Broadcasting SystemPBT Portable Breathalyzer Test (police drunk testing)PBX Private Branch Exchange (telco)PC (1)Personal ComputerPC (2)Printed CircuitPCI Peripheral Component Interconnect (Intel)PCM Pulse code modulationPCMCIA Personal Computer Memory Card International AssociationPCN Personal Communication NetworkPCS (1)Personal Communication Service (mobile phone)PCS (2)Performance Control SystemPCS (3)Prelaunch Compatibility Station (GPS)PCS (4)Personal Communications SystemPDA Personal Digital Assistant (palmtop computer)PDC Personal Digital CellularPDF Portable Document Format (Adobe)PDM Pulse Duration ModulationPDP Programmed Data Processor (DEC, 1960 on, classic machines)PDS Particularly Dangerous Situation (NOAA/NWS)PDT Pacific Daylight Time, USPDU Protocol Data UnitPE (1)ice pelletsPE (2)Portable Executable (Micky$oft)PEM Privacy Enhanced MailPEO-C3S Program Executive Office - Command, Control and Communications SystemsPEO-IEWS Program Executive Office - Intelligence, Electronic Warfare and SensorsPEP Peak envelope powerPER Packed Encoding RulesPERL Practical Extraction and Report Language, Unix scriptingpers personnelPERSCOM Personnel commandPEST Plasma Experiment Satellite Testpf PicofaradPF Pilot FlyingPFC (1)Private, First ClassPFC (2)Prepared Form Card, a homemade QSL for a station to signPFRR Poker Flat Research Range, AKPGP Pretty Good Privacy, e-mail encryption programPHOTINT Photographic Intelligence (satellite pics, etc.)PHP PHP Hypertext Processor (a recursive acronym)PI protection intervalPIC Programmable Interrupt Controller (computers)PIN Personal Identification Numberpine Pine Is Nearly/Not/Not yet Elm, Unix mailerPING Packet InterNet Groper (ICMP "ping pong" tester for net)PIO (1)Public Information OfficerPIO (2)Programmed Input/OutputPIP Peripheral Interchange Program, old CP/M copyPIPEX Public IP EXchange (UK)PIREP Pilot Report, weather in standard formPIW Person(s) In WaterPK WND peak windPL (1)"Private Line," Motorola tradename for CTCSSPL (2)Pilot lightPL/1 Programming Language 1 (computer code)PLB Personal Locator BeaconPLC Power Line Carrier (Power company LF control system)PLIP Parallel Line Internet ProtocolPLL (1)Phase Locked LoopPLL (2)prescribed load listPLS CW brevity: PleasePM (1)Phase Modulation, slightly resembles FMPM (2)Post Meridian, hours between noon and 11:59 localPM (3)Project ManagerPMBO Participating MailboxPMC Personnel management centerPMCS Preventive maintenance checks and servicesPME Protective Multiple Earth (ground)PMFC Pacific Missile Firing CenterPMO Provost Marshall's OfficePMRS Private Mobile Radio ServicePMSV Pilot-to-Metro ServicePM-TRCS Project manager, tactical radio communication systemsPN Pseudo-NoisePNA Philippines News AgencyPNF Pilot Not FlyingPNO precipitation amount not availablePNP Positive/Negative/Positive; transistor typePO dust/sand whirls (dust devils)POB Persons On BoardPOC Point of ContactPOCSAG Post Office Code Standardization Advisory Group (paging)POD Point of debarkationPOE Point of embarkationPOES Polar Orbit Environmental SatellitePOETS Push Off Early - Tomorrow's SaturdayPOL Petroleum, oils, and lubricantsPOL-ARQ Polish diplomatic ARQ teleprinter systemPOP (1)Post Office Protocol (Internet)POP (2)Point of presencePOR Pacific Ocean Region (USCG)PORTS Physical Oceanographic Real-Time SystemsPOSIX OSI standard, like UnixPOSIX Portable Operating System InterfacePOST Power-On Self Testpot Potentiometer [~]POTS (1)Plain Old Telephone SystemPOTS (2)Plain Old Telephone ServicePOTS (3)Purchase Of Telephone Service (US Government)POTUS President Of The United Statespp Phone patchPP Transmission is in PortuguesePPDL Point to Point Data LinkPPM (1)portable pixmapPPM (2)Page per minutePPM (3)Parts per millionPPM (4)Pulse Position ModulationPPP Point-to-Point ProtocolPPPoE Point-to-Point Protocol over EthernetPPR Prior Permission Required (military landing permit)PPTP Point-to-Point-Tunneling ProtocolPQM path quality matrixPR (1)Puerto RicoPR (2)Person Reporting (police)PR partialPRB Personal Radio Bureau (FCC)PRB-1 Personal Radio Bureau 1, FCC resolution attempting to preempt local radio lawsPRB-1 Personal Radio Bureau-1 (FCC tower rule)PRC (1)Pseudo-Range Correction (DGPS)PRC (2)People's Republic of Chinaprep preparationPRESRR pressure rising rapidly


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PRFG partial fogPRM Pulse rate modulationPRML Partial Response Maximum Likelihood (HD transfer mode)PROM Programmable Read Only MemoryProSEDS Propulsive Small Expendable Deployer System (NASA)Prosign Procedural Signal ("over," etc.)PRZ Polar Return to ZeroPS/2 Personal System 2, IBM's less-than-sensational replacement for the PCPSA Public Service AnnouncementPSAP Public Safety Answering PointPSB Personnel services battalionPSDN Public Switched Data NetworkPSE CW brevity: PleasePSK Phase-shift keyingPSK-31 Phase-shift keyed very narrowband simplex direct printing schemePSL Process Specification languagePSM Pulse step modulationPSO Public service officerPSR Primary Surveillance RadarPSRAM Pseudo Static Random Access Memory, obsolescentPSS (1)Personnel service supportPSS (2)Packet Switch Stream (British Telecom)PSSN pseudo sunspot numberPST Pacific Standard Time, USPSTN Public Switched Telephone NetworkPSWAC Public Safety Wireless Advisory CommitteePT (1)Preparedness, Training and Exercises Directorate (FEMA)PT (2)Patrol Torpedo (boat)PT (3)Permeability TunedPTC Parallel Test Component (Linux)PTD Pilot-to-dispatcherPTO Permeability tuned oscillatorPTR (1)Primary Training RangePTR (2)Puerto RicoPTR (3)Pointer [~]PTT (1)Push to talkPTT (2)Post, Telegraph and Telephone administration (UK)PU ("Papa Uniform") participating unitpub publicationPUP Principal User ProcessorPVASI Pulsating Visual Approach Slope IndicatorPVO private volunteer organizationPWINO precipitation identifier sensor not availablePWM Pulse width modulationPWR PowerPY sprayQ HectoPascals (U.S. METAR variant)Q Quality (measure of selectivity in inductive circuits)QA Quality AssuranceQAM Quadrature Amplitude ModulationQCWA Quarter Century Wireless Association (amateur)QLF Facetious prosign: Now send with your LEFT footQNH Set your altimeter to -- barometric pressureQoS Quality of ServiceQPC Question Pool Committee (amateur exams)QPSK Quaternary Phase Shift KeyingQRA The name of my station is --QRCT Quick Reaction Communications TerminalQRG (1)Your frequency is -- kHzQRG (2)The frequency is --, KennethQRH Drift ("Your frequency varies...")QRL I'm busy; frequency is in useQRL? (1)Are you busy?QRL? (2)Is this frequency in use?QRM InterferenceQRN NoiseQRO (1)High power operationQRO (2)Please increase powerQRP (1)Low power operationQRP (2)Please reduce powerQRP (3)Quick Reaction Package (US Army vehicle)QRQ Please increase code sending speedQRR Old land distress call, now SOS, MAYDAY, or QRRRQRRR Old land distress callQRS Please reduce transmission speedQRSS (1)VERY low speed CW ("super QRS")QRSS (2)Quasi-Random Signal SourceQRT (1)Station has ceased transmittingQRT (2)Please cease transmittingQRU I have no traffic for youQRU? Do you have traffic for me?QRV I am ready (go with your traffic)QRX Please standbyQSA Signal strengthQSB FadingQSD Your keying is defectiveQSK Duplex CW ("break-in")QSL (1)A card or letter confirming reception of a radio stationQSL (2)Acknowledgment of transmission, a fancy "roger"QSO Communications between two or more stationsQST (1)General call: "Hello all amateurs"QST (2)Ham radio magazine published by ARRLQSTAG Qadripartite Standardization AgreementQSV Send VsQSV? Should I send Vs?QSX I am listening on...QSY (1) Frequency changeQSY (2) Change frequency to -- kHzQTC MessageQTH Location of stationQWD Quarterly World Days, observation intervalsQWERTY Name of standard typewriter keyboard, from top row of ltrsQWZ Facetious prosign: Are you woozy? I am woozyR chks Radio checksR (1)CW prosign: "Message received"R (2)DC resistance (in ohms)R (3)ResistorR (4)RightR (5)RunwayR&D Research & DevelopmentR&O Report & Order (FCC)R/T Receiver/TransmitterR/W Rotary wing (helicopter)R3E Single sideband, reduced carrier (usually 6 dB) radiotelephonyRA (1)Radio Authority (UK)RA (2)RainRA (3)Radio AustraliaRA (4)File format: Real AudioRAA Royal Australian ArmyRAAF Royal Australian Air ForceRAC-ARQ ARQ mode propietary to Racal/ThalesRACES Radio Amateur Civil Emergency Service, FEMA affiliatesRacon Radar BeaconRAD Radiological [~]Radar Radio Detection And RangingRADARA Regional And Domestic Air Route AreaRADAY Radio Day (US Mil)RADIL ROCC/AWACS digital information link


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RADINT (1)Radar intelligenceRADINT (2)Radiation intelligenceRADIUS Remote Authentication Dial In ServiceRADM Rear AdmiralRADMO Radio ModeRADSL Rate Adaptive Asymmetric Digital Subscriber LineRADSTA Radio StationRAF Royal Air ForceRAG Replacement Air GroupRAI Radio Televisione Italiana RAID (1)Redundant Array of Inexpensive Disks (servers)RAID (2)Rapid Assessment and Initial Detection team (FEMA/Army NG)RAIL Runway Alignment Indicator LightsRAM Random Access Memory (can be changed)RAMAC Random Access Method Of Accounting And Control (IBM, 1956)RAMDAC Random Access Memory Digital to Analog ConverterRAMP Radar Modernization ProjectRAN Royal Australian NavyRAOC rear area operations centerRAPCON Radar approach controlRARP Reverse Address Resolution ProtocolRASC Radio Atmospheric Science Center (Japan)RASP Radio Science And PropagationRATCF Radar Air Traffic Control Facility (USN)RATS Radio Amateur Telecommunications SocietyRATT Radioteletype (usually military 75/100 bd)RAV Restricted AvailabilityRB Radar BeaconRBL Realtime Blackhole List (Internet)RBL Realtime Blackhole List (spam filtering)RBS Radar Bomb ScoringRC (1)Reserve Components (US Army)RC (2)Radio controlRCA Radio Corporation of AmericaRCC (1)Rescue Coordination Center (GMDSS)RCC (2)Range control center (USAF)RCC (3)Resource control complexRCC (4)Rag Chewer's Club (ham award)RCCC Range communications control centerRCI Radio Canada InternationalRCMA Dead scanner radio club, which included HF utilityRCNC Range communications network controllerRCNY Rules of the City of New YorkRCO Range Control Officerrcp Remote Copy (unix)RCP Resource Change ProposalRCR Runway Condition ReadingRCS (1)Radio Communication SystemRCS (2)Reaction Control System (NASA)RCS (3)Radar cross-sectionRCS (4)Radio Conference Subcommittee (of IRAC)RCS (5)Remote Control SystemRCS Radio Conference Subcommitteercv Receive modercvr receiverRD (1)replacement directorateRD (2)Restricted dataRD (3)Regional DirectorRD Radar man (old USCG grade)RDARA Regional and Domestic Air Route AreaRDEC Research, Development and Engineering Center (Army)RDF (1)Radio direction findingRDF (2)Resource Description FrameworkRDF (3)Resource Description FormatRDF (4)Rapid Deployment ForceRDF (5)Repeater Distribution Frame (telephony)RDF (6)Raw Data FileRDF (7)Record Description FieldRDM (1)Radio Data ModemRDM (2)Radio Diffusion Marocaine (Morroco)RDNS Reverse Domain Name System lookup (Internet)RDRAM RAMBUS (company) Dynamic Random Access MemoryRDS Remote Data ServiceRDT Remote digital terminalRE Reverse engineeringREACT Radio Emergency Associated Communication Team, like ARES, but on CB and GMRSREC Radio-electronic combatrec receiverecon reconnaissanceREDHORSE Rapid Engineer Deployable Heavy Operational Repair Squadron, EngineerREE Radio Exterior de Espana (Spain overseas broadcaster)Reg regulation, includes radio rulesREJ Packet control frame: Reject, data out of sequenceRem (1)Remark (computer programming)Rem (2)Radiation-equivalent, man (nuclear safety)REP Radiological Emergency Preparedness (program)REQ requestreq'd requiredRETMA Radio, Electronics, Television Manufacturers Assn, now EIAretrans retransmissionrev reverseRF Radio FrequencyRF/EMPINT Radio Frequency/Electromagnetic Pulse IntelligenceRFC (1)RF ChokeRFC (2)Request For Comment (Internet standards)RFDS Royal Flying Doctor Service (Australia)RFDU RF distribution unitRFE Radio Free EuropeRFI (1)RF InterferenceRFI (2)Radio France InternationalRFID Radio Frequency IdentificationRFP Request For ProposalsRFPI Radio For Peace International, Costa RicaRFR RF radiationRG-# Radio Guide, Radio Group, Radio Grade (differs) - coax cable designatorRGB Red, Green, Blue; additive color mixing like TVRGS Remote ground stationRHC Radio Havana CubaRHCP Right-hand circular polarizationRHOJ Radar home on jamRI (1)Routing indicator (Telex or radiograms)RI (2)Ring Indicator (modem line)RIAA Recording Industry Assn of America (audio)RIFF Resource Interchange File Format (Microsoft MIDI)RIMM (1)RAMBUS In-Line Memory ModuleRIMM (2)Removable Interchangeable Media ModuleRIO (1)Radar Intercept OfficerRIO (2)Relative Ionospheric OpacityRiometer Relative Ionospheric Opacity Meter (uses cosmic RF)RIPE Regional Internet Registry for EuropeRIPE Reseaux IP Europeens (Internet registry)RISC Reduced Instruction Set Computing, chip architectureRIT Receiver Incremental Tuning, same as "clarifier"RITL Radio In The Loop (telephony)RJ Radio JapanRLC Resistance-Inductance-Capacitance (network)Rlogin Remote Login, networking program like telnetRM (1)("Romeo Mike") Radioman, radio operator


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RM (2)Radio Man (old USCG grade, became TC)RM (3)File extension: Real MediaRMA (1)Revolution in Military Affairs (US tax subsidized paper crunching)RMA (2)Return Merchandise AuthorizationRMA (3)Reduced Major Axis)RMA (4)Old Microsoft midi file format (see MIDI)RMC Regional Meteorological CenterRMI (1)Radio Magnetic IndicatorRMI (2)Republic of the Marshall IslandsRMI (3)RIFF MIDI (an acronym made up of acronyms)RMI (4)Radio Miami InternationalRMK RemarksRMP (1)Radio Mobile Patrol (NYPD car)RMP (2)Radio Motor PatrolRMP (3)Radio Móvil Privada (Spanish: Private Mobile Radio)RMP (4)Raster Map ProductRMP (5)Radio Merkury Poznan (Poland)RMS (1)Royal Majesty ShipRMS (2)Royal Mail Steamer (obsolete?)RMS (3)Root Mean SquareRMS (4)Remote Mine SweepingRMS (5)Radar Manual SystemsRMS (6)Remote Manipulator System (space shuttle's robot arm)RMTN Region IV Meteorological Telecommunication NetworkRN (1)Radio NetherlandsRN (2)Royal NavyRN (3)Registered NurseRN (4)Revision NoticeRN Radio Netherlandsrn Read News, usually the default Unix Usenet readerRNR Packet control frame: Receive Not ReadyRNZ Radio New ZealandRNZAF Royal New Zealand Air ForceRNZI Radio New Zealand InternationalRNZN Royal New Zealand NavyRO Radio Officer (traditionally trained in Morse code)RO Receive OnlyROA Remotely Operated AircraftROC (1)Regional Operating Center (FEMA/NCS)ROC (2)Rear operations centerROC (3)Reservoir Operating Center (USACE)ROCC Regional Operations Control CenterROE Rules Of EngagementROFL Rolling On Floor Laughing (Internet, also ROTFL)ROFOR Route ForecastRoger Voice Prosign: Message Received (from "R" in Morse code)ROLAP relational on-line analytical processing (databases)ROM Read Only Memory (can't easily be changed)ROMPRES Romanian press agencyRON Remain Over Night (US military)ROSE RATS Open System Environment (Packet; see RATS)ROTATE Radar Observations of Tornadoes And Thunderstorms ExperimentROTFL Rolling On The Floor Laughing (Internet, also ROFL)ROTHR Relocatable (HF) Over-The-Horizon RadarROTR Receive-Only Typing Reperforator (tape printer)ROVER Remote Out-of-Vehicle Emergency Radio (LAPD)RP (1)Received Pronunciation (British radio "accent")RP (2)Reporting Party (Police)RPA (1)Remote Passphrase AuthenticationRPA (2)Radio-Programming ApplicationRPC Remote Procedure Call (lousy Windoze security)RPG Report Program Generator (strange IBM computer language)RPI Runway Point of InterceptRPM Red (Hat) Package Manager (Linux)rpm Rotations per minuteRPN Reverse Polish Notation (computing)rpt (1) Reception reportrpt (2) CW prosign: repeatRptr RepeaterRPU Remote Pickup UnitRQ (1)Repeat RequestRQ (2)Request acknowledgment of receipt (DSC protocol)RQS Request to send (modem handshaking line, rare name for RTS)RR (1)Transmission is in RussianRR (2)Radio Regulation (ITU)RR (3)Railroad (don't laugh, some use HF)RR (4)Packet control frame: Receive ReadyRR (5)Response and Recovery Directorate (FEMA)RR (6)Radio Reloj (clock radio, SS news format)RRC (1)Regional Radio Conference (ITU)RRC (2)Range Rate Correction (DGPS)RRP Runway Reference PointRRSS Radparker Relay Spam StopperRRx Routine Report, where x is a sequential letter, used for delayed METARRS (01)radiated susceptibilityRS (02)range squadronRS (03)reentry systemRS (04)requirements submissionRS (05)resource schedulingRS (06)Radio Satellite (Russian amateur)RS (07)EIA Recommended Standard, RS-232 was oneRS (08)Record Separator (ASCII)RS (09)Radio SwedenRS (10)Reference StationRS-232 Recommended Standard 232, standard serial I/O, now EI-232RSA (1) Rivest-Shamir-Adelman, inventors of a proprietary type of public-key encryptionRSA (2)Republic of South AfricaRSGB Radio Society of Great Britainrsh Restricted shell (Unix)RSN Real Soon Now (when everything is going to happen)RSO Range Safety OfficerRSOC Regional SIGINT Operation Center (like Menwith, UK)RSS (1)Really Simple Syndication (world wide web)RSS (2)Radio SubsystemRSS (3)RDF Site Summary (see RDF #2)RSS (4)Rich Site SummaryRST (1)Signal report: Readability, Strength, [Tone] (if CW)RST (2)ResetRSTA reconnaissance, surveillance and target acquisitionRSVP (1)Resource Reservation ProtocolRSVP (2)Repondez Si'Vous Plait (Please Respond, party invitations)RT (1)RadiotelephoneRT (2)Receiver-transmitterRT (3)Receive TimingRT (4)routing tableRTB Return to baseRTC Rail Traffic ControlRTCA Radio Technical Commission for AeronauticsRTCE Reat-Time Channel EvaluationRTCM Radio Technical Commission for Maritime (services)RTCP Real Time Control ProtocolRTD Return to dutyRTDC Real time data controllerRTE Radio Telefs Éireann (Ireland)RTF (1)Radiodiffusion Television FrancaisRTF (2)Runtime fileRTFM Read the [fine] manualRTFMS Real-Time (HF) Frequency Management Software


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RTHK Radio Television Hong KongRTLS (1)Return to launch siteRTLS (2)Real-Time Locating SystemsRTO (1)Responsible Test Organization (US)RTO (2)Radiotelephone Operator (LAPD)RTO (3)Range training officerRTOK Retest OKRTOS Real Time Operating SystemRTS Request To Send (secondary handshaking modem line)RTT (1)RadioteletypeRTT (2)Radio Transmission TechnologyRTTY RadioteletypeRTZ Return To ZeroRVR Runway Visual RangeRVRNO RVR system not availableRWI radio wire integration (changed to NRI-net radio interface)RWR Radar Warning ReceiverRWY runwayRX (1)ReceiverRX (2)Religious programmingRX (3)RetransmissionRXD Received Data (Serial I/O)RXR Receive Reversed (usually RTTY Mark/Space)RY RYRYRY teleprinter test callRZ Return to ZeroS (1)southS (2)Siemens seconds/n Serial numberS/N Signal/Noise ratioS/NR Signal/Noise Ratios/off Sign offs/on Sign ons/w software (computer programs and instructions)S&TCD Space and Terrestrial Communications DirectorateS1 Adjutant (US Army)S2 Intelligence Officer (US Army)S3 Operations and Training Officer (US Army)S3A Supervised Standard Scientific AnalysisS4 Supply Officer (US Army)SA (1)South AtlanticSA (2)SandSA (3)Situational AwarenessSA (4)Selective Activation (GPS)SAA South Atlantic Anomaly, a large magnetic deviationSAAF Small Austere Air FieldSAAFR Standard use Army Aircraft Flight RouteSABC South African Broadcasting CorporationSABM Packet control frame: Set Async Balanced Mode (connect)SAC Strategic Air Command, now part of US StratcomSACCS Strategic Automated Command & Control SystemSACD Super Audio Compact Disk (Sony/Philips)SACEUR Supreme Allied Command(er) EuropeSACLANT Supreme Allied Commander, Atlantic {NATO}SAE Self Addressed Envelope (usually with IRC or "green stamp")SAFE Selected Area For EvasionSAGE Semi-Automated Ground Environment (early, huge, USAF system)SAID Sub-Auroral Ion DriftSALS Short Approach Lighting SystemSAM (1)Special Air Mission (US Air Force VIP flight)SAM (2)South America (MWARA)SAM (3)Surface-to-Air missileSAMCOM Special Air Missions Communications ("Mystic Star")SAME Specific Area Message Encoding (US weather warnings)SANA Syrian Arab News AgencySAO (1)South Atlantic OceanSAO (2)Surface Aviation Observation (weather)SAP (1)Second Audio ProgramSAP (2)Special-Access ProgramSAP (3)Soon As Possible, when every radio project has to be doneSAR (1)Search and rescueSAR (2)Synthetic Aperture RadarSAR (3)Station Availability Report (SHARES)SARAH Standard Automated Remote to Autodin HostSAREX Shuttle Amateur Radio ExperimentSARNET NOAA SARSAT NetworkSARSAT Search And Rescue SatelliteSART (1) Survival Craft Radar TransponderSART (2) Search And Rescue TransponderSARTG Scandinavian Amateur Radio Teleprinter GroupSASE Self Addressed Stamped EnvelopeSAT (1)South Atlantic (MWARA)SAT (2)SatelliteSAT (3)SaturdaySATAN Security Administrator Tool for Analyzing NetworksSATCOM Satellite communicationSATERN Salvation Army Team Emergency Radio NetworkSAVASI Simplified Abbreviated Visual Approach Slope IndicatorSAWS Stand Alone Weather SystemSB (1)Standby (EIA-449)SB (2)Sierra Bravo, son of a [female dog]SB (3)SidebandSBA (1)Sovereign Base AreaSBA (2)Small Business AdministrationS-band 1.55-5.2 Ghz microwave bandSBCS Single Byte Character SetSBD Safe Braking Distance (railroad)SBD1 Safe Braking Distance + 1 minute (also SBD2, etc)SBE Society of Broadcast EngineersSC Sudden commencement (of a magnetic storm; causes fadeouts)SC-104 Special Committee #104 (DGPS Standard)SCA (1)Subsidiary Communications Authorization (US commercial FM)SCA (2)Shuttle Carrier Aircraft (NASA's modified 747 for transporting orbiter)SCADA Supervisory Control and Data Acquisition SystemSCAMP Single-Channel Antijam Man-PortableSCAT Strategic Communications (Continuing) Assessment ProgramSCCS satellite communications control systemSCDCC Southern California Digital Communications Council (Amateur)SCDX Sweden Calling DXersSCDXC Southern California DX ClubSCI San Clemente Island (USN, CA)SCMA Southern California Monitoring AssociationSCN (1)System Coordination Net (US Coast Guard)SCN (2)SHARES Coordination Net (US NCS/SHARES)SCO (1)Subcarrier oscillatorSCO (2)Santa Cruz Organization, a software sourceSCO (3)State Coordinating Officer (FEMA/NSEP)SCOPE System Capable Of Planned Expansion (Scope Command)SCPC Single channel per carrierSCPT Single channel per transponderSCR Silicon controlled rectifierSCRAM Scramble; automated fast shutdown of nuclear reactor [~]SCRRBA Southern California Repeater/Remote Base Assn (Amateur)SCS Satellite Control SquadronSCSI Small Computer System Interface ("scuzzy")SCSL stratocumulus standing lenticular cloudSCT Scattered cloudsSDF Simplified Directional Facility


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SDH Synchronous Digital HierarchySDI Strategic Defense Initiative, U.S. space money sinkSDLC Synchronous Data Link Control, bitwise computer comm protocolSDLP Station Data Link ProtocolSDNRIU Secure Digital Net Radio Interface UnitSDR Software Defined RadioSDRAM Synchronous Dynamic Random Access MemorySDSL Symmetric Digital Subscriber LineSDU Secure data unitSDX Semi-duplexSE SoutheastSEA Southeast Asia (MWARA)SEAD Suppression of Enemy Air DefensesSEAL Sea, Air, Land (US Navy special op teams)SEAM Space Emergency Action MessageSEATO South East Asia Treaty Organization (now ASEAN)sec SecondSEC Software Engineering Center (Army)SECAF Secretary of the Air ForceSECAM (1)SEquentiel Couleur A Memoire, weird French TV standard, adopted by Russian bloc to keep out Western TVSECAM (2)Simply Everything Contrary to AmericaSECDEF Secretary of Defense (US)SECT SHARES Emergency Coordination TeamSECURE State Emergency Capability Using Radio EffectivelySECURITE Prosign: safety traffic follows; uses FF pronunciation SEE-CURE-EE-TAYSEDENA Secretaria de la Defensa Nacional (Mexico)SEE Stimulated Electromagnetic EmissionsSELCAL Selective Calling (tones or numbers) [~]SELFEC Selective FECSELSCAN Proprietary name for Collins scanning ALE HF radio systemSENS System Event Notification Service (Windows)SENSAPI System Event Notification Service API (nested acronym)SENSE Synthetic Environments for National Security EstimatesSEP Solar Energetic Particle Event (observation interval)SES Ship Earth StationSESC Space Environmental Services CenterSESEF Ship Electronic Systems Evaluation Facility (US Navy)SETI Search for Extra-Terrestrial Intelligence (by radio)SEVOCOM Secure voice communicationsSEW Space & Electronic WarfareSF Special FacilitySFA Single Frequency ApproachSFC surfaceSFCG Space Frequency Coordination GroupSFDU Standard formatted data unitSFF Small Form Factor (hard disks)SFU Solar flux unitSG Signal groundSG snow grainsSGIN Subgroup Identification Number (FCC)SGML (1)Standard Generalised Markup LanguageSGML (2)Standard Generalized Markup LanguageSGRAM Synchronous Graphic Random Access MemorySGT SergeantSH (Rain) Showerssh Bourne Shell, originally the Unix default command interpreterSHA-1 Secure Hash Algorithm-1, US codeSHAEF Supreme Headquarters, Allied Expeditionary ForcesSHAPE Supreme Headquarters, Allied Powers, EuropeSHARES SHAred RESources, part of US Federal NCSSHF super high frequencySHIFOR Stastical Hurricane Intensity FORecastSHIPS Stastical Hurricane Intensity Prediction SchemeSHOALS Scanning Hydrographic Operational Airborne LIDAR Survey SHTTP Secure Hypertext Transfer Protocol (web)SI (1)Systeme Internationale d'Unites; a standard unit systemSI (2)Shift In (Baudot & ASCII)SIC (1)Service Identification CodeSIC (2)Standard Industrial ClassifificationSIC (3)Standards Implementation CommitteeSIC (4)Specific Inductive CapacitySID Sudden Ionospheric Disturbance (solar flare effect)SIG (1)Signature [~]SIG (2)Special Interest GroupSIGCEN signal center [~]SIGINT Signals Intelligence [~]SIGMET Significant Meteorological warning signals [~]SILENCE MAYDAY Voice prosign: frequency is on standby for distress traffic; uses FF pronunciation SEE-LONCE MAY-DAYSIMM Single In-line Memory ModuleSIMMS Single In-line Modular Memory SystemSIMOP Simultaneous Operation (of radios; an interference standard)Simul SimulcastSINAD signal-plus-noise-plus-distortion to noise-plus-distortion ratioSINCGARS Single-Channel Ground/Airborne Radio SystemSINPFEMO Signal report: adds modulation and propagation detailsSINPO Signal report: adds Noise, Propagation to SIOSINS Ship's Inertial Navigation SystemSIO (1)Signal report: Strength, Interference, Overall (1-5)SIO (2)Serial Input/OutputSIOP Single Integrated Operational PlanSIOPS Special Intelligence OperationsSIPRNET Secret IP Router Network (military's own Internet w/NIPRNET)SIR Subsurface Interface RadarSIRTF Space Infrared Telescope Facility (NASA)SIS (1)Secret Intelligence Service (aka MI6, UK)SIS (2)Scramble Information Service (Dutch planespotter network)SITFAA Inter-American Air Forces Telecommunications Network (Spanish)SITOR (1) Simplex Teleprinting Over RadioSITOR (2) Simplex Telex Over RadioSITOR-A Simplex teleprinting over radio system, mode A (ARQ)SITOR-B Simplex teleprinting over radio system, mode B (FEC)SITREP Situation reportSITSTAT Situation statusSIU Server Interface UnitSJA Staff judge advocateSK CW prosign: "End of transmission," usually written VASKC Sky clearSKYWARN NWS/ARRL amateur severe weather spotting networkSLAM Standoff Land Attack MissileSLB Single Letter Beacon (Russian Navy marker xmsn)SLBM Sea-Launched Ballistic MissileSLC Space Launch ComplexSLEP Service Life Extension ProgramSLHFB Single-Letter High-Frequency beacon (see SLB)SLIP Serial-Line Internet Protocol, older than PPPSLOC Sea lines of communicationSLOSH Sea, Lake, and Overland Surges for Hurricanes SLP (1)Seaward Launch PointSLP (2)sea-level pressureSLPNO sea-level pressure not availableSLR Shielded Loop ReceiverSLS Space Launch SquadronSM Statute MilesSMART (1)Self Monitoring Analysis and Reporting TechnologySMART (2)Self-Managed Arrival Resequencing ToolSMART (3)Segmented Method for Analytical Ray-TracingSMART-T Secure Mobile Antijam Reliable Tactical TerminalSMASH Synchronous Multi-channel Access Signalling for HF


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SMB Server Message Block (Windows)SMC Space and Missile CenterSMEX Small Explorer (Goddard/NASA)SMF Special Message FieldSMMW Sub-millimeter waveSMRS Specialized Mobile Radio SystemSMS Short Message Service (text)SMSI Sommet Mondial sur la Société de l'InformationSMT Surface mount technologySMTP Simple Mail Transfer Protocol (Internet)SN (1)Serial numberSN (2)SnowSNA System Network ArchitectureSNAFU Situation Normal All [Fouled] UpSNINCR snow increasing rapidlySNMP Simple Network Management Protocol, computersSNR Signal to Noise RatioSNSM Société Nationale de Sauvetage en Mer (French National Society for Ocean Rescue)SO DIMM Small Outline Dual Inline Memory ModuleSO (1)Sheriff's OfficeSO (2)Shift Out (ASCII)SOA School Of the Americas (now WHISC)SOAP Simple Object Access Protocol (Internet)SOAR Special Operations Air RegimentSOB Souls On Board, number of people on an aircraftSOCOM Special Operations Command (US Navy)SODIMM Small Outline Dual In-line Memory ModuleSOF (1)Special Operations ForcesSOF (2)Safety Of FlightSOH Start Of Heading (ASCII)SOHFRAD Special Operations High Frequency RadioSOHO (1)Solar Heliospheric Observatory (satellite at Lagrange point)SOHO (2)Small Office/Home Office (computing)SOI (1)Signal of interestSOI (2)Signal operation instructionsSOI (3)Space Object Identification (NORAD)SOIR Simultaneous Operations on Intersecting RunwaysSOJ Small Outline J-leadSOL [Spit] Out of LuckSOLAS Safety Of Life At Sea (series of international treaties)Sonar Sound detection & rangingSONET Bell spec for data transmission over optical fiberSONGS San Onofre Nuclear Generating StationSOP Standing/Standard operating procedureSOPS Space Operations SquadronSOS Morse distress call, sent as one long character, replaced CQD [~]SOSB special operations support battalionSOSEC Surveillance Observation Satellite Evaluation CenterSOSEX SOSUS ExerciseSOSS (1)Sound Search StationsSOSS (2)Soviet Ocean Surveillance SystemSOSUS (1)Sound Surveillance Underwater System; network of hydrophones across Bering Straight to listen for Russian subsSOTDMA Self-Organizing Time Division Multiple AccessSOUTHCOM Southern CommandSOW (1)Start Of WatchSOW (2)Statement Of WorkSP (1)South Pacific (MWARA)SP (2)Silent Period (500 kHz CW watch, obsolete)SP (3)Shore Patrol (US Navy MPs)SP (4)Space (RTTY)SPAC Spectrum Planning and Policy Advisory CommitteeSPACECOM US Space CommandSPAR (1)Special Air Resources, US Air Force VIP flightSPAR (2)Seagoing Platform for Acoustic ResearchSPC Storm Prediction Center (NOAA)SPDT Single-Pole, Double-ThrowSPDU HFDL: Squitter Protocol Data UnitSPE Satellite Proton Event; solar-terrestrial disturbanceSPECI (1)Aviation Selected Special Weather Report, from FrenchSPECI (2)an unscheduled report taken when certain criteria have been metSPEEDX Society for the Preservation of the Engrossing Enjoyment of DXing. I believe that an old "bug" key had this tradename as well.SPF Shortest Path FirstSPI (1)Service Provider InterfaceSPI (2)Stateful Packet InspectionSPINCOM Special Intelligence CommunicationsSpkr SpeakerSPL Sound Pressure LevelSPL/1 High-Order Signal Processing Language #1SPO Security, plans, and operationsSPOD Seaport of debarkationSPS (1)Spectrum Planning Subcommittee (of IRAC)SPS (2)Standard Positioning ServiceSPS (3)Service Propulsion System (Apollo project)SPSS Space Surveillance SquadronSPST Single-Pole, Single-ThrowSpt SupportSPTT Security Policy Translation TableSPX Sequenced Packet ExchangeSQ squallssqdn SquadronSQL Structured Query Language (computer databases)SQPSK Staggered Quadrature Phase Shift Keying (like OQPSK)SR Special Reconnaissance (SR-71 "Blackbird")SRA Specialized repair activitySRAM Static Random Access MemorySRB Solid-Rocket Booster(s), NASA Space Shuttle, recovered by BRVSRMS Smart Resource Management SystemSRWBR Short Range Wide Band RadioSS (1)Transmission is in SpanishSS (2)SandstormSS (3)Shifting Standards (computer marketing technique)SS (4)Steam ShipSSA Supply support activitySSB Single SidebandSSC Sudden Storm Commencement (geophysics)SSD Satellite Services Division (NOAA)SSE South-southeastSSE-CMM Systems Security Engineering-Capability Maturity ModelSSEC Selective Sequence Electronic Calculator (IBM, 1948)SSF Southern Straits of FloridaSSG The Space Systems Groupssh Secure Shell (Unix)SSI Server Side Includes (web)SSI Space Science InstituteSSID (1)Secondary Station Identifier (packet)SSID (2)Service Set Identifier (wireless networking)SSL Secure Sockets Layer (encrypted TCP/IP computer networking)SSN (1) Sunspot NumberSSN (2) Nuclear Submarine (US Navy)SSN Social Security Number (same as TIN - FCC forms)SSOM Spanish language numbers transmission, male voiceSSPAR Solid State Power Amplifier-ReceiverSSR (1)Secondary Surveillance RadarSSR (2)Soviet Socialist Republic (obsolete)SSR/IFF Secondary Surveillance Radar/Identification Friend or FoeSSRAM Synchronous Static Random Access MemorySSRC Single Sideband, Reduced CarrierSSSC Single Sideband, Suppressed Carrier


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SST (1)Supersonic Transport (aircraft)SST (2)Sea Surface TemperatureSSTV Slow Scan TelevisionSSW South-southwestSSYL Spanish language numbers transmission, female voiceST Send Timing (EIA-449)STA (1)Status (packet)STA (2)Special Temporary Authority (from FCC, to do something)STAJ Short Term Anti-Jam (makes gurgling noise on-air)STAMIS Standard Army Management Information SystemSTANAG Standardization Agreement (NATO) [~]STAR SHARES Transportable Auxiliary RadioSTARC State Area Command (Army NG)STARS (1)Space-based Telemetry And Range SafetySTARS (2)Secure Tactical Army Radio SystemSTARS (3)Standard Terminal Automation Replacement SystemSTARS-V Secure Tactical Army Radio System-VHFSTAT Old CP/M status command, replaced in version 3.0STCICS Strike Command Integrated Communications System (RAF)STD (1)StandardSTD (2)Solar-Terrestrial Dispatch, Canadian auroral warning centerSTG Satellite Tracking GroupSTK Strike ControlsTLD Sponsored Top Level Domain (.aero, .coop, etc)Stn StationSTP Shielded Twisted Pair (cable)STPD standard temperature, pressure, drySTRATCOM U.S. Strategic CommandSTS Space Transport System, the "Space Shuttle"STSA Standard Telemedicine System ArchitectureSTT Shore Targeting TerminalSTU Secure Telephone UnitSTU-III Secure Telephone Unit, Third GenerationSTX Start Of Text (ASCII)SUA/ISE Special Use Airspace/Inflight Situational EnhancementSUB Substitute (ASCII)SUNA Sudan News AgencySUO Small Unit OperationsSuperDARN Super Dual Auroral Radar Networksuppl supplementSURFnet Dutch academic networkSUV Sport-Utility Vehiclesvcs servicesSV-CW-C Greek Telegraphy Club, aka GTCSVP (1)Single Line Variety Package (telco)SVP (2)Si Vous Plait ("If you please" in French)SVT (1)Sveriges Television (Swiss TV network)SVT (2)Secure Voice TerminalSW (1)Shortwave (high frequency - HF)SW (2)SouthwestSWBC Short Wave BroadcastingSWED-ARQ Swedish ARQ teleprinter system, used by that countrySWF Short Wave Fadeout (ionospheric disturbance)SWI Special World Interval, unscheduled radio astronomy observation period caused by solar eventSWL Shortwave ListenerSWR (1)Standing Wave RatioSWR (2)Surface-Wave RadarSWS Standard Workstation (US Coast Guard)SX (1) SimplexSX (2) Old Hallicrafters prefix, usually meant radio had xtal filterSYMPA Systeme de Multi-Postage Automatique (French mailing list program)SYN Synchronous IdleSYNOP Synoptic weather reports (from surface observations)Sysop System Operator, the king on a BBST (1)US Coast Guard C3 office, DC; aka G-TT (2)Boston transit systemt Time (in seconds)T/R Transmit/Receive switchingT1 Relatively high speed data connection over phone lineT2FD Terminated, Tilted, Folded Dipoletac tacticalTAC Tactical Air Command, now ACCTAC Technical Advisory CommitteeTACACS Terminal Access Controller Access Control SystemTACAMO Take Charge And Move Out (US Navy CP aircraft)TACAN Tactical Air NavigationTACC (1)Tanker/Airlift Command Center (US AMC)TACC (2)Tactical Aircraft Control Center (US)TACFIRE Tactical fire direction systemTACS Terminal Access Conversion Service (UK)TACS Traffic Alert and Collision Avoidance SystemTACSAT Tactical satelliteTACSATCOM tactical satellite communicationsTACT Tailored Annual Cutter Training (USCG)TACTS Tactical Aircrew Combat Training SystemTAD Temporary Additional DutyTADIL Tactical Digital Information Link (US)TAF Terminal Aerodrome Forecast, aviation weatherTAFB Tropical Analysis and Forecast Branch (TPC) TAI International Atomic TimeTAL Transoceanic Abort Landing (space shuttle)TALCE Tanker Air Lift Control ElementTANJUG Old Yugoslav news agencyTAO Tactical Action OfficerTAOC Tactical Air Operations CenterTAP Telocator Alphanumeric Protocol (paging)TAPR Tuscon (AR) Amateur Packet Radio, ham software sourcetar Tape Archive, Unix backup/archive programTARBS Television and Radio Broadcasting Services (Australia)TARPS Tactical Airborne Reconnaisance Pod SystemTARPS-DI TARPS Digital ImageryTAS True Air SpeedTASMA Two-meter Area Spectrum Management Assn. (Amateur)TAW Tactical airlift wingTAWC Tactical Air Warfare CenterTBA To Be AnnouncedTBD To Be DeterminedTC Telecommunications Specialist (old USCG grade, was RM)TCAS Traffic (Alert) & Collision Avoidance SystemTCC Telecommunications centerTCF Tactical combat forceTCH Threshold Crossing HeightTCM Trellis Coded ModulationTCN Track Condition Notice (railroad)TCP Transmission Control ProtocolTCP/IP Transmission Control Protocol/Internet ProtocolTCPA Time to Closest Point of ApproachTCPOD Tropical Cyclone Plan Of the DayTCS (1)Tactical Control SystemTCS (2)Tactical Camera SystemTCU Towering CumulusTCWF Terminal Convective Weather ForecastTD (1)Transmitted Data, short for TXDTD (2)Transmitter/Distributor (old RTTY)TD (3)Tropical DepressionTDA Table of distribution and allowancesTDD Time Delay DistortionTDM Time-Division Multiplex


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TDMA Time Division Multiple AccessTDOA Time Difference Of ArrivalTDP Takeoff Decision PointTDU Threat Display Unit TDY Temporary duty ("to go TDY")TEC Total Electron Content (of ionospheric region)TECG Tactical Exercise Control GroupTEI Text Encoding InitiativeTelco Telephone Company ("The phone company")Telcom Telephone communicationTELCOR Telecommunications Operating Requirements (USN)Telecom TelecommunicationTeletext Short text messages, usually in TV blank intervalTELINST Telecommunications InstructionsTelnet Internet or dialup protocol for remote loginTEMPEST Telecommunications Electronics Material Protected from Extraneous Spurious Transmissions (secure enclosure for computers, etc.; prevents eavesdropping)TEMPO Temporary weather changeTERPES Technical Electronic Processing and Evaluation SystemTESTM Metar Test MessageTEXN Traffic Exchange Network (MARS)Tfc Traffictfc TrafficTFE Tactical field exchangeTFEO Tactical field exchange officerTFN Till Further NoticeTFR Temporary Flight RestrictionTFT (1)Thin Film TransistorTFT (2)Task Force TerminalTFW Tactical Fighter WingTHAAD Theater High Altitude Area DefenseTHD Total Harmonic Distortion (audio, in %)THFRS Transformation High-Frequency Radio SystemTHREATCON Threat Condition (Alpha, Bravo...)TIA (1)Telecommunication Industry Association (UK)TIA (2)Thanks in advanceTIA (3)The Internet Adaptor, clever SLIP emulator from dialup shellTIBS (1)Tactical Information Broadcast SystemTIBS (2)Telephone Information Briefing ServiceTIDLS Tactical Information Data Link SystemTIFF Tagged Image File Format, versatile computer graphic standardTIGER Topologically Integrated Geographic Encoding and ReferencingTIM Time Intermodulation distortion (audio)TIN Taxpayer Identification Number (same as SSN - FCC forms)TIP Threat Image ProjectionTIS (1)Traveler's Information StationTIS (2)Trusted Information SystemTIS (3)This Is (ALE)TISCOM Telecom & Information Systems Command, VA (USCG)TKAP Transmitter Keep-Alive ProgramTLA Three-Letter Acronym (NASAspeak for NASAspeak)TLD Top Level Domain (.com, .org. .net, etc)TMC (1)Technical Materiel Corporation, out of businessTMC (2)TeleMonteCarlo, MonacoTMDE Test, measurement, and diagnostic equipmentTMMMC Theater medical materiel management centertms TeamsTN ("Tango November") Track number (ASW)TN3270 Telnet for IBM mainframes, emulates old 3270 terminalTNC (1)Terminal Node Controller (packet)TNC (2)Threaded Neill-Concelman (connector)TNC (3)Threaded Navy Connector (alternate)TOA Time Of ArrivalTOC Tactical Operations CenterTOD (1)time of dayTOD (2)Tactical Ocean DataTOD (3)Target Offset DistanceTOD (4)Takeoff DistanceTODS TFR Operations Display System (see TFR)TOE (1)Table(s) of organization and equipmentTOE (2)Theory of everything (physics)TOR Teleprinting (or Telex) over RadioTOW (1)Tube-launched Optically-tracked Wire-guided missileTOW (2)Terminal orderwireTOW (3)Time Of Week (see GPS)TOW (4)Takeoff WeightTPC Tropical Prediction Center, Miami, FLTPFDD Time-phased force and deployment datatpi Turns per inchT-Plex 8-frequency duplex ARQ teleprinter systemTPM Technical Protection MeasuresTPO Transmitter power outputTPR Third-Party RelayTPRAM Triple Port RAMTR Transmit-ReceiveTRACAB Terminal RAdar control in the tower CABTRACE Transition Region And Coronal Explorer (NASA)TRACON Terminal Radar Approach ControlTRADOC United States Army Training and Doctrine Commandtrans TransportationTRANSCOM Transportation CommandTRC (1)Tactical Radio CommunicationTRC (2)Transmission Release CodeTRI-TAC Joint Tactical Communicationstrmt TreatmentTRSA Terminal Radar Service AreaTRT Tropical RadioTelegraph, once owned by United Fruit CoTRUEX Training in Urban Environment Exercise (USMC)TS (1)thunderstormTS (2)Tropical StormTSA Transportation Security AdministrationTSB Technical Support Branch (TPC)TSC (1)Tactical Service Center (US Navy)TSC (2)TRICARE Service Center (US Navy medical)TSC (3)Terrorist Screening CenterTSC (4)Technical Subcommittee (of IRAC)TSC (5)Training Systems ContractTSC (6)Training Support CenterTSCC (1)Tactical Surveillance Control Center (US Navy)TSCC (2)Transportation Security Control Center (TSA)TSCC (3)Trauma Symptom Checklist for ChildrenTSCC (4)Telemetry Standards Control CommitteeTSCC (5)Telemetering Standards Coordination CommitteeTSCC (6)Tracking Signal Corrections CounterTSCM Technical surveillance countermeasures (antibugging)TSGT Technical SergeantTSNO thunderstorm information not availableTSOP Thin Small Outline PackageTSP (1)Telecommunications Support Plan (NCS)TSP (2)Telecommunications Service Priority (NCS)TSR Terminate and Stay Resident (IBM programming)TSSR Tropospheric Scatter (TROPO)-Satellite Support RadioTTL (1)Transistor-Transistor LogicTTL (2)Time To Live (of Internet packets or DNS records)TTL (3)Talk To ya LaterTTL (4)Through The LensTTP Trusted Third Party (for authentication of public keys)TTT CW prefix: Distress call followsTTWCS Tactical Tomahawk Weapon Control System


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TTY TeletypeTTYL Talk (Type) To You Later (Internet)TU (1)CW brevity: Thank youTU (2)Terminal unit (old current-loop RTTY)TUBA TCP and UDP with Bigger Addresses (possible Internet extension)TV TelevisionTVA Tennessee Valley Authority (big dam operator)TVC Televisió de Catalunya (Catelan TV, Barcelona)TVI Television interferenceTVNZ Television New ZealandTWA (1)Trailing-wire antenna (USN ELF/Tacamo)TWA (2)Tilt Whip Adaptor (US Army)TWA (3)Trans World AirwaysTWAIN (1)Toolkit Without An Important Name (Standard graphic scanner interface)TWAIN (2)Technology Without An Interesting NameTWAS This Was (ALE)TWEB Transcribed Weather BroadcastTwinplex Four-frequency duplex teleprinter systemTWR (1)towerTWR (2)Trans World RadioTWT Traveling Wave TubeTWX Teletype Wide-area eXchangetx Transmitter, talkTXD Transmitted Data (Serial I/O modem line)txt (1)Extension: file is unformatted ASCII text (computers)txt (2)TextU CW brevity code: "You"U UpU/L (1) UplinkU/L (2) UploadUA (1)Packet control frame: Unnumbered AcknowledgementUA (2)User Agent (Internet)uA MicroampUART Universal Asynchronous Receiver/Transmitter (computer)U-ATA Ultra-AT AttachmentUAV Unmanned Aerial Vehicle (USAF)UCVE Unconfined Vapor Cloud ExplosionUDP User Datagram Protocol, type of Internet packet good for streamingUDRE User Differential Range Error (GPS)UDT (1)Universal Dataflow and TelecommunicationsUDT (2)Underwater Demolition Team, crack USN WWII unitUEJ Unattended Expendable Jammeruf MicrofaradUFN Until Further NoticeUFO (1)Unidentified Flying ObjectUFO (2)UHF Follow On, new Navy COMSATUGR Unitized group rationUHF Ultra High Frequency (300-3000 MHz)UI (1)User InterfaceUI (2)Packet designator: Unnumbered InformationUI (3)User InitiatedUID User IdentificationUIDL User Initiated DownloadUIN Universal Internet Number (ICQ)UK United KingdomUKADGE UK Air Defense Ground EnvironmentUKCC United Kingdom Control CenterUKMACCS United Kingdom Maritime Coastal Communications SystemUKMET United Kingdom Office of Meteorology (also a model)UKNET UK network for UUCPUKSOF UK Satellite operations facility, part of NATOUL (1)UploadUL (2)Unauthorized launchUL (3)Underwriters' LaboratoriesULS Universal Licensing System (FCC)UMT Unit ministry teamUMTS Universal Mobile Telecommunications SystemUN United NationsUNB Universal Magnetic Balununcl unclassifiedUNCLASS Message is not classified [~]UNCLOS United Nations Convention on the Law of the SeaUNF (1) UN ForcesUNF (2) UnformattedUNHCR UN High Commission for RefugeesUNI User Network InterfaceUnid UnidentifiedUniden UnidentifiedUNIFIL UN Interim Forces, LebanonUnivac Universal Automatic Computer, once IBM's main competitionUnix Not an acronym; computer op-system derived from MULTICS [~]Unk UnknownUNO United Nations OrganizationUNPROFOR UN Provisional ForcesUNSCOM UN Special Commission (Iraq inspectors)UP (1)CW prosign: "change to working frequency"UP (2)unknown precipitationUPNP Universal Plug aNd PlayUPS (1)Uninterruptible Power SupplyUPS (2)United Parcel ServiceUR CW brevity code: "Your"URE Unión de Radioaficionados EspañolesUreq User request (computer return code)URL Universal Resource Locator (World Wide Web)URSI International Union of Radio ScienceURSIGRAM Coded solar-terrestrial report, originally from URSIUS (1)United StatesUS (2)Unit Separator (ASCII)USA (1)United States of AmericaUSA (2)US ArmyUSA (3)Underground Service Alert ("dial before you dig")USA (4)Unit self-assessmentUSACE US Army Corps of EngineersUSADA US Department of the ArmyUSAF US Air ForceUSAFA US Air Force AcademyUSAFAWC US Air Force Air Warfare CenterUSAFE US Air Forces, EuropeUSAIS US Army Intelligence and Security Command, VAUSAMMA US Army Medical Materiel AgencyUSAR (1)Urban Search & RescueUSAR (2)US Army ReserveUSAREUR US Army, EuropeUSARSPACE US Army Space Command, part of USSPACECOMUSART Universal Synchronous/Asynchronous Receiver/TransmitterUSASC US Army Signal CommandUSASCH US Army Support Command HawaiiUSASDC U.S. Army Strategic Defense Command, now USASSDCUSASI US Army Space InstituteUSASSDC US Army Space and Strategic Defense Command, formerly USASDCUSAV US Army VesselUSAWC US Army War CollegeUSB (1)Upper SidebandUSB (2)Universal Serial BusUSC (1)United States Codes (Federal statute law)USC (2)Unified Space Command, now USSPACECOMUSC (3)Up S[pit] CreekUSCENTCOM US Central Command


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USCG US Coast GuardUSCGA US Coast Guard AuxiliaryUSCGC US Coast Guard CutterUSCGR US Coast Guard ReserveUSCS US Customs ServiceUSCSIS United States Space Command Space Intelligence SystemUSD US DollarsUSDA US Department of AgricultureUSELMNORAD US element, North American Aerospace Defense CommandUSENET "User Network," huge volunteer organization that propagates "News," not necessarily over InternetUSEUCOM US European CommandUSFJ US Forces, JapanUSFS US Forest ServiceUSFWS US Fish and Wildlife ServiceUSG (1)US Gallons (about 4 liters)USG (2)US GovernmentUSGS (1)US Coast & Geodetic SurveyUSGS (2)US Geological SurveyUSIA US Information AgencyUSKA Union Schweizerischer Kurzwellen-Amateure (Swiss ham assn)USLANTCOM US Atlantic CommandUSM US MarshalUSMA US Military AcademyUSMC US Marine CorpsUSMCR US Marine Corps ReserveUSMS US Marshals ServiceUSMTF United States Message Text FormatUSN US NavyUSNA US Naval AcademyUSNG US National GuardUSNO US Naval ObservatoryUSNR (1) US Naval ReserveUSNR (2) US Navy, RetiredUSNS US Naval ShipUSO United Service OrganizationsUSOS Unshift On SpaceUSP University of the South Pacific (Fiji, classes by radio)USPACOM United States Pacific CommandUSPHS United States Public Health ServiceUSPS (1)United States Postal ServiceUSPS (2)US Power SquadronsUSR (1)UserUSR (2)US Robotics (modem mfgr)USS United States ShipUSSOCOM US Special Operations CommandUSSOUTHCOM U.S. Southern CommandUSSPACECOM U.S. Space CommandUSSS United States Secret ServiceUSSTRATCOM U.S. Strategic CommandUSTA United States Total ArmyUSTRANSCOM United States Transportation CommandUSVI US Virgin IslandsUT (UT0 - UT3) Universal Time scales (corrected constantly)UTB Utility BoatUTC (1)Universal Time, Co-ordinated (corrected with leap sec.)UTC (2)Coordinated Universal TimeuTLD Unsponsored Top Level Domain (.biz, etc)UTP Unshielded Twisted Pair (hardwired networks)UUCP Unix-to-Unix Copy Program (Unix file transfer s/w)Uudecode Unix program, converts uuencoded files back to binariesUuencode Unix program, converts binary files to ASCII for transferuuf Micro-microfarad, now pf (picofarad)uV MicrovoltUV UltravioletuW MicrowattUWB Ultra WidebandUWC Universal Wireless Communications consortiumUXB Unexploded BombUXO Unexploded OrdnanceV (1)Voltage (electromotive force)V (2)VariableV (3)Verificationv VelocityVA (1) CW prosign: "End of transmission"VA (2) Volt-amps (as in a power supply)VA (3) Veteran's AdministrationVA volcanic ashVAAA Voice Activated Auto Attendant (telco)VAAT Voice Activated Audio Text (telco)VAB Vehicle Assembly Building (NASA)VABP Voice Activated Blue Pages (telco)VAC Volts Alternating CurrentVAD Voice-Activated Dialing (telco)VADM Vice-AdmiralVAFB Vandenberg Air Force Base (CA)VAIVR Voice Activated Interactive Voice Response (telco)VAL Visiting Aircraft LineVANC Voice-Activated Network Control (telco)VAPD Voice Activated Premier Dialing (telco)VAS VOLMET Automation SystemVASI Visual Approach Slope IndicatorVAX (1)Variable Address Extension (old DEC Computer)VAX (2)English vacuum cleaner brand : )VAX/VMS VAX Virtual Memory System, op-system for aboveVBI Vertical Blanking Interval (TV)vBNS Very high speed Backbone service (US)VBR Variable Bit RateVBS Visual Basic Scripting (Microsoft security nightmare)VC in the vicinityVcc Collector voltageVDC Volts Direct CurrentVDE Video Display Editor, at one time standard freeware CP/M & PC text editorVDL VHF Data Link (ARINC)VDLM2 VDL, Mode 2VDLC Virtual Data Link CapabilityVDSL Very high-data-rate Digital Subscriber LineVDSL Very-high-bit-rate Digital Subscriber LineVDT Video Display TerminalVDU Video Display UnitVE Volunteer Examiner (Amateur)VEC Volunteer Examiner Coordinator (Amateur)VENONA Old US codeword for its USSR decryption program 1943-1980 [~]VESA Video Equipment Standards Association, computer displaysVESREP Standard report from commercial fishing vesselVF (1)Voice frequencyVF (2)Velocity FactorVF (3)Fighter squadron (USN)VFAT Virtual File Allocation Table (MS-Windows)VFO Variable Frequency OscillatorVFR Visual Flight RulesVFT Voice Frequency Telegraph (multiplex RTTY)VHF Very High Frequency (30-300 MHz)vi Visual Editor, full-screen text editor for UnixVICS Vehicle Information Communication SystemVIN Vehicle Identification NumberVIP Very Important PersonVIS visibilityVISNO visibility at secondary location not available


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VLB VESA Local Bus; PC display bus, now usually done by the PCIVLF Very Low Frequency (3-30 kHz)VLM Virtual Loadable Module (Novell)VM (1)Voice mirrorVM (2)Virtual memoryVMC Visual Meteorological ConditionsVMS Virtual Memory System, good but obsolete DEC OSVNA Viet Nam News AgencyVne Absolute top speed of an aircraft; "never exceed"VOA Voice Of AmericaVocoder Voice coderVOH Voice Of Hope (KVOH, religious broadcaster)VOIP Voice Over Internet ProtocolVOLMET Flight weather transmission, for planes in routeVolt Unit of electrical potential, named for Alessandro VoltaVOM Volt-Ohm MeterVOMUX Voice MultiplexerVOR (1)VHF Omnidirectional Ranging (Aircraft NAVAID)VOR (2)Voice Of RussiaVORTAC Ground station combining VOR and TACANVOX Voice operated switchingVPF Vertical Processing Facility (NASA)VR (1)Voltage regulatorVR (2)Visual Route (air training route)VRAM Video RAMVRB Variable windVRC (1)Vehicular Radio Communications (AN/VRC-xxx)VRC (2)Vehicular radio configuration (Army)VRC (3)Vertical Redundancy Check, fancy name for parity (computers)VRML Virtual Reality Modeling LanguageVROC Vertical rate of climbVRT Vlaamse Radio- en Televiseomroep (Belgian) VSAT Very Small Aperture (Antenna) TerminalVSC Vertical Service Code (telco features - start with *)VSFC Virginia Space Flight Center, Wallops Islandvsh Visual Shell, clunky full-screen command interpreter for UnixVSWR Voltage standing wave ratioVT (1)Vertical Tab (ASCII)VT (2)Valid Time (wx forecasts)VTnnn Series of old DEC terminals, still a popular emulation codeVTP Virtual Terminal ProtocolVTS Vessel Traffic ServicesVTVM Vacuum-tube voltmeterVU Volume UnitsVUFER VHF/UHF Frequency Experimental RadioVV Vertical Visibility (of obscured sky)VVV CW test groupVWS Virtual Warning SystemVxD Virtual Device Driver (MS-Windows)VXO Variable Crystal OscillatorVY CW brevity code: "Very"W Power, in wattsW westW Whisky ("Benchmark Whisky" is USN offset)W3C World Wide Web ConsortiumWA (1)CW prosign: word afterWA (2)Work Authority (railroad orders)WABNRES Worldwide Airborne Resources (command a/c)WAC (1)Worked All Continents (amateur award)WAC (2)Women's Army Corps, obsoleteWAC (3)World Aeronautical ChartWAD Wide-Area Domain (computer games)WAFS World Area Forecast System, satellite delivered air wxWAGB USCG designation for icebreakerWAIS Wide-Area Information ServerWAMS Wide Area Master StationWAN (1)Wide-Area NetworkWAN (2)Wide-Area Network StationWAP (1)Wireless Application ProtocolWAP (2)Wireless Access PointWARC World Administrative Radio ConferenceWARN Weather Amateur Radio Network, see SKYWARNWARP Weather and Radar ProcessorWAS (1)Wide-Area SurveillanceWAS (2)Worked All States (US amateur award)WAS/MTI Wide Area Surveillance/Moving Target IdentificationWATS Wide Area Telephone ServiceWAZ Worked All Zones (amateur award)WB (1)WidebandWB (2)CW prosign: word beforeWB (3)Welcome Back (Internet)WB (4)Warner Bros (Good movie studio, lousy TV network)WBFM Wideband frequency modulationWBU World Broadcasting UnionsWBU-ISOG WBU Inter-Union Satellite Operations GroupWBU-TC World Broadcasting Unions Training CentersWCRP (1)World Climate Research ProgramWCS (1)Wireless Communications ServiceWCS (2)Waste Collection System (Space shuttle potty)WDC World Data Center, any of several for solar-terrestrial obsW-DCMA Wideband Code Division Multiple AccessWE Western ElectricWEFAX Weather FacsimileWEMA Work Equipment Movement Authority (railroad orders)WEMF World Electronic Media ForumWEP Wired Equivalent Privacy (wireless computer LANs)WFAS Wildland Fire Assessment System (USFS)WFM Wideband FMWFN War Fighter NetWFO Weather Forecast OfficeWG Working Group (ITU)WG/SO Working Group for Surface ObservationsWGI World Geophysical Interval (research observation period)WHCA White House Communications AgencyWHEC High-Endurance Cutter (USCG)WHISC Western Hemisphere Institute for Security Cooperation (see SOA)whoami Returns name you are logged in under (Unix) [~]whois Internet lookup program for finding people by querying servers [~]WIE With Immediate EffectWIFCOM Wirefree communications (US Navy)Wi-Fi Wireless Fidelity, 802.11 standard interface; originally 802.11bWilco Voice prosign: Will complyWIMP (1) Window, Icon, Mouse, Pointer (graphical interface)WIMP (2) Weakly Interacting Massive ParticleWINS Windows Internet Naming ServiceWINSOCK Windows Sockets API, used for networking from Microsoft s/wWISE Web-Integrated Software metrics EnvironmentWIU Wayside Interface Unit (railroad)WIX USCG designation for training barque EagleWkg WorkingWL Wordlength, size of basic data group (computing)WLAN Wireless Local Area Network (computing)WLB Seagoing Buoy Tender (USCG)WLI Inland Buoy Tender (USCG)WLIC Inland Construction Tender (USCG)WLIS We Love Interval Signals (Pirate)WLL wireless local loopWLM Coastal Buoy Tender (Medium Endurance USCG vessel)


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WLR River Buoy Tender (USCG)WMD (1)Weapons of Mass DestructionWMD (2)Weapons of Mass Distraction (psyops tongue-in-cheek)WMD-CST Weapons of Mass Destruction Civil Support TeamWMEC Medium-Endurance Cutter (USCG)WMO World Meteorological OrganizationWMR World Music RadioWMSCR Weather Message Switching Center ReplacementWMTS Wireless Medical Telemetry ServiceWMV Windows Media VideoWND windWNW West-northwestWO Work orderWORM Write-Once Read-Many (CD-R, allows making own CD-ROMs)WPA Wi-Fi Protected AccessWPB Patrol Boat (USCG)WPM Words per minuteWRAPA Work Restricted Authority/Protect Against (railroad orders)WRC World Radio (Communications) ConferenceWRCC Western Regional Climate Center (NOAA)WRTH World Radio TV HandbookWRU Who Are You? (RTTY)WSHFT wind shiftWSL Weapons Survivability Lab WSM Weapon system managerWSMR White Sands Missile Range (NM)WSO Weapon Systems Officer ("Whizzo")WSRO Weapon system replacement operationsWST Weather StationWSTF White Sands Test Facility (NM)WSW West-southwestWT (1)Walkie-talkieWT (2)Wireless Telegraph (Morse or RTTY)WTB (1)Wireless Telecommunications Bureau (FCC)WTB (2)Want To Buy (radio swap ads)WTDD Wayside Train Defect Detector (hotbox/dragger detector)WTGB 140' Icebreaking Tug (USCG)WTLD Wayside Train Length DetectorWTMD Walk-Through Metal DetectorWU Western UnionWUAN Wireless Universe Area Network WUN World Utility News, Internet group, maintains large e-mail list, rhymes with "one"WVDC Working Voltage, DC (capacitors)WW Weather WarningWWABNCPP Worldwide Airborne National Command Post ProgramWWCR (1)World Wide Christian Radio (callsign)WWCR (2)World Wide Conspiracy Radio (facetious)WWMCCS Worldwide Military Command and Control System, obsolescentWWNWS World Wide Navigational Warning ServiceWWRB World Wide Religious Broadcasters (callsign)WWV NIST standard frequency & time station, Boulder, COWWVB NIST Boulder, CO, low frequency standard broadcastWWVH NIST standard frequency & time station, Kekaha, HIWWVL Old NBS low-frequency time stn, no longer on airWWW World Wide Web, aka W3, www, Web, World Wide WaitWx WeatherWYFR We're Your Family Radio (Callsign)WYSIWYG What You See Is What You Get (computers)X (1) Reactance, in ohmsX (2)(Also "Xray") prosign for end of sentenceXAML eXtensible Application Markup Language (mickeysoft)X-band (1)8-12 GHz microwave bandX-band (2)Expanded AM band, 1610-1720 kHzXCHS Extended Cylinder, Head, Sector (addressing)xcvr Transceiverxfmr TransformerXINU XINU Is Not UNIX (recursive and retrograde)xistor Transistorxmit Transmit modeXML eXtensible Markup Languagexmlns XML namespaceXMODEM Async file transfer protocol, uses 128-byte or 1K packets, over direct links, not InternetXMS Expanded Memory System (IBM PC, different spec from EMS)xmsn Transmissionxmt Transmit modexmtr TransmitterXO Executive officerXon/Xoff Computer serial flow control, usually using DC3/DC1 (^S/^Q)xponder TransponderXSD XML Schema Definitions (see XML)XSL eXtensible Style LanguageXSS (1)Cross Site Scripting (Computer security)XSS (2)eXperimental Satellite System (USAF)XSS (3)eXtremely Simple Syndication (news feed)XSS (4)Callsign for new UK/NATO ALE system [~]XT eXtra Value (PC-XT was first IBM PC with a hard disk; obsolete)xtal CrystalXTP eXpress Transfer Protocol (computers)XUL (1)XML User-interface LanguageXUL (2)eXtensible User-interface LanguageX-windows Standard windowing system for networks (usually Unix) [~]XXX (1)CW prefix: traffic is urgent (same as SECURITE) [~]XXX (2)Set of standards for X.25 PAD packet networkingXYL Wife ("ex-young lady")Y2K Year 2000, or resulting computer bugs (geekspeak)YAHOO Yet Another Heirarchical Officious Oracle; may be a back-formation, as guys who started Yahoo! styled themselves as just yahoosYB Yacht Boy (Grundig radio line)YF CW brevity code: "Wife," more typically "XYL"YL Female voice ("Young Lady")YLE Yleisradio (Finland, not an acronym)YMMV Your Mileage May Vary (cardinal rule of HF)YMODEM Along with YMODEM-G, improved async file transfer protocol [~]Z (1)Zulu time, standard time on 0 meridian, like UTZ (2)Impedance (in ohms)Z (3)This message has FLASH precedenceZ-80 Early 8-bit processor chip, used by CP/M, still madeZ-Count 29-bit binary GPS time stamp (17 LSBs are broadcast)ZAA Z-code: You have improper circuit disciplineZAE Z-code: I am unable to receive youZAN Z-code: We have absolutely negative copyZBI UK Military Z-code: Switch to voice modeZBO Z-code: (INT ZBO Do you have traffic (of precedence...) for me?) I have traffic (of precedence...) for youZBR Z-code: Break for retuningZBZ Z-code: (INT ZBZ: What is my signal's printing acceptability? (1-5) ) Your signal's printing acceptability is (1-5)ZCP Z-code: I have poor conditions; please use full powerZCPR3 Small Z-80 operating system, improved on CP/M, obsoleteZDE Z-code: Message undeliveredZDF Z-code: Message deliveredZEN Military Z-code: Message has been copied to...ZFD Military Z-code: Message may be a duplicateZFG Military Z-code: Message is a duplicate and is to be forwardedZKI Z-code: Listen [on _ kHz]ZKR Z-code: I have a radio watch on _ kHzZNC Z-code: I have no communication with _ZNG Z-code: Band conditions no good for copyZNI Z-code: No station ID heardZNJ Military Z-code: Message has been sent to...ZNK Military Z-code: Addressees who do not hold cryptographic facilities are exempted


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ZNR Military Z-code: Msg may be forwarded without change by radio or non-approved circuitZNR UUUUU Security Warning Signal: Message is Unclassified or offline encrypted - OK to forward unchanged on any circuitZNX You have disclosed an EEFI (1-10; see EEFI)ZNY Military Z-code: Do not forward this message unencrypted byradio or non-approved circuit.ZNY RRRRR Security Warning Signal: Message is RESTRICTEDZNY CCCCC Security Warning Signal: Message is CONFIDENTIALZNY SSSSS Security Warning Signal: Message is SECRETZNY TTTTT Security Warning Signal: Message is TOP SECRETZRF Zero Retention ForceZRO Z-code: How copy?ZSR Z-code: You are strong-readableZUC Z-code: Unable to comply until ----ZUH Z-code: Unable to complyZUT (1)Unofficial Z-code: "CW Forever!" (see CW)ZUT (2)Zeta Upsilon Tau, 60s US Coast Guard radio op societyZWEI ZWEI Was EINE Initially (recursive acronym; see EINE)ZWR Z-code: You are weak-readable° degrees? wavelengthµ microµµF micro-microfarad, now pFµH microhenryµV microvolt? ohms? angle theta

Police/CB 10-codes:

10-1 Your signals are being received poorly10-2 Your signals are loud & clear10-3 Stop transmitting10-4 Your message is received ("Roger;" saying both is redundant)10-5 Please relay10-6 Station is busy10-7 Out of service, radio off10-8 In service, available10-9 Please repeat message10-10 Out of service, radio on10-19 Go back to station/HQ10-20 Location ("What's your 20?")10-21 Use landline/phone10-22 Cancel message10-23 Stand by10-27 Driver's license ID check10-28 Vehicle registration check ("Rolling 28" -CHP)10-33 All units stand by, frequency is on emergency status10-97 I am arriving at assignment/ on scene ("I'm 97")10-98 Assignment completed/ leaving scene10-99 Emergency; equivalent to SOS and MAYDAY

Other police codes:

Code 1 Come in on the radioCode 2 Respond quickly, without lights/siren ("hurry")Code 2A Hurry faster - call is priorityCode 3 Respond with lights/sirenCode 4 No more help needed, situation stableCode 4A No more help needed, suspect still not in custodyCode 5 Stakeout at (--), uniformed patrol stay awayCode 6 Out of vehicle, on investigationCode 7 Out to lunchCode 10 Request clear frequencyCode 20 Notify news mediaCode 30 AlarmCode 30A Alarm with audible suspects insideCode 33 Emergency, all units stand byCode 37 Vehicle is stolen (LAPD)Code Alpha Assemble at prearranged staging point (LAPD)Code Blue (1)Notify policeCode Blue (2)Respiratory emergency (medical)Code Red (1)Notify fire departmentCode Red (2)Frequency is restricted (LAPD Metro)

(your cops might be a bit different)

Computer networking standards:

IEEE 1394 "Firewire" high speed data transfer

56Kflex Telephone modem 56K, falling back in 2K increments from there.

802 Family of IEEE recommendations for computer networks802.3 Ethernet, fast packet transfers, resembles wired radio802.3ab Hot-rod Ethernet, one billion bits/sec over long copper802.3u Provides auto-speed, autoselection of duplex802.3z Hot-rod Ethernet, one billion bits/sec over fiber or twinax802.11 Draft standard for wireless Ethernet802.11 Original system; 1-2 Mbps using spread spectrum 2.4 GHz802.11a 54 Mbps via 5-GHz orthogonal FDM802.11b 11 Mbps in 2.4 GHz spread spectrum (Wi-Fi)802.11g 20+ Mbps in 2.4 GHz SS802.12 Recommendation for 100BaseVG/ 100VG/ AnyLAN

10Base-2 IEEE 802.3 thin ethernet (high-speed computer networking)10Base-5 IEEE 802.3 thick ethernet10Base-F IEEE 802.3 ethernet over fibre-optic cable10Base-T IEEE 802.3 ethernet over twisted pair cabling1000Base Gigabit ethernet standards1000Base-CX Short-haul over copper1000Base-LX 1300nm multimode and single-mode fiber according to 802.3z1000Base-SX 850nm multimode fiber according to 802.3z1000Base-T Long-haul over copper according to 802.3ab100Base-T IEEE 802.3 fast ethernet at 100Mbit/s100Base-T4 Encoded 100Mbit/s over 4 pairs, obsolescent100Base-TX encoded 100Mbit/s over 2 pairs100Base-VG see 100VG-AnyLAN100Base-X Encoded 100Mbit/s100VG-AnyLAN 100Mb/s LAN carrying Ethernet or Token-Ring, obsolescent

ATM Asynchronous Transfer ModeAAL ATM Adaptation LayerAAL-1 Synchronous adaptation layer designed for carrying voice trunk linesAAL-2 Adaptation layer intended for variable bit rate video, but never really got off the ground and is not offered by vendorsAAL-3/4 Adaptation layer intended to be used by Frame Relay and SMDS and other delay-insensitive variable rate or bursty data traffic, but mostly now passed over in favour of AAL-5AAL-5 'Simple and efficient adaptation layer' for computer networking

Bell 103 300 bps FSK (US modem tones, see V.21)Bell 212A 1200 bps (US modem tones, see V.22)

T1 Relatively high speed data connection over phone line


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V.nn Prefix for CCITT specs - these are for phone modemsV.17 Fax modem spec, to 14400 bpsV.21 aka "Bell 103," the old 300 bps modem spec, makes sound like RTTYV.22 aka "Bell 212A," 1200 bps modem spec, slight differencesV.22bis Above spec extended to 2400 bpsV.23 1200/75 bps modem specV.24 data link spec - equiv RS232V.25bis modem control sequence for international calls, lost out to HayesV.26bis 2400bps half duplex synchronous, used for faxV.27ter 4800bps half duplex synchronous, used for faxV.28 Data link specV.32 9600/4800bpsV.32bis 14.4K/12K/9600/7200/4800bpsV.32 terbo (V.32 bis ter) proprietary modem spec for 19,200V.34 33.6K/31.2K/28.8K/26.4K/24K/19.2K/16.8K/14.4Kbps, then like V.32V.42 LAPM error control, 1200bps and aboveV.42bis Data compression, 1200bps and aboveV.90 56Kb, falls back like 56KflexV.FC V.Fast Class: unofficial, 19.2Kbps

X.nn ITU-T (formerly CCITT) recommendations:X.PC Async version of X.25 for small computersX.10 Proprietary device control by signalling over AC linesX.21 balanced data signalling standard, 15 wiresX.21bis Above, for 25 wires, unbalancedX.25 Packet communication protocols (AX.25 is amateur radio)X.27 37-pin data interface, adding handshake and flow controlX.28 Standard interface, terminal to PADX.29 Control packet standard for PAD and remote host, using X.25X.3 PAD standardX.31 Network security protocolX.400 E-mail protocolX.413 Definition of message storage and forwardingX.419 Defines P3 and P7 protocolsX.420 Defines interpersonal e-mailX.435 Defines control messagesX.441 Defines voice messagesX.500 Directory standardX.509 Digital security and identification

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