Biorhythms, computers, music, and…. My Biorhythm.
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Transcript of Biorhythms, computers, music, and…. My Biorhythm.
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Biorhythms, computers, music, and…
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My Biorhythm
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Lyman Briggs Lecture Series
• Emerging Issues in Abortion: Beyond Pro-life and Pro-choice
• Adrienne Asch
• TONIGHT!
• 7:30 PM, C-106 Holmes Hall
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Group Question
• Get into a group of three people
• You have three minutes to come up with two answers and make an educated guess at a third
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Discussion Questions
• What defines a computer:– What is the simplest definition of a computer
you can come up with?– What defines a modern computer?
• What was the first computer? – If you don’t know, make a guess
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Definition of Computer
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Definition of a Computer
• Information Processor
• Input and Output
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Definition of Modern Computer
• Inputs, outputs, processes and stores information
• Physical: Keyboard, monitor, etc. – are these necessary components?
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History of Computers - Long, Long Ago
• beads on rods to count and calculate• still widely used in Asia!
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History of Computers - Way Back When
• Slide Rule 1630• based on Napier’s rules for
logarithms• used until 1970s
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History of Computers - 19th Century
• first stored program - metal cards
• first computer manufacturing
• still in use today!
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Charles Babbage - 1792-1871
• Difference Engine c.1822 – huge calculator, never finished
• Analytical Engine 1833– could store numbers
– calculating “mill” used punched metal cards for instructions
– powered by steam!
– accurate to six decimal places
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Discussion Question
• What was the biggest advance that led to modern computers?– Electricity– Transistor– Microchip– Data storage
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Vacuum Tubes - 1941 - 1956
• First Generation Electronic Computers used Vacuum Tubes
• Vacuum tubes are glass tubes with circuits inside.
• Vacuum tubes have no air inside of them, which protects the circuitry.
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UNIVAC - 1951
• first fully electronic digital computer built in the U.S.
• Created at the University of Pennsylvania
• ENIAC weighed 30 tons • contained 18,000
vacuum tubes • Cost a paltry $487,000
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Grace Hopper
• Programmed UNIVAC• Recipient of Computer
Science’s first “Man of the Year Award”
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First Computer Bug - 1945
• Relay switches part of computers
• Grace Hopper found a moth stuck in a relay responsible for a malfunction
• Called it “debugging” a computer
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First Transistor
• Uses Silicon• developed in 1948• won a Nobel prize• on-off switch
• Second Generation Computers used Transistors, starting in 1956
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Second Generation – 1965-1963
• 1956 – Computers began to incorporate Transistors
• Replaced vacuum tubes with Transistors
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Integrated Circuits
• Third Generation Computers used Integrated Circuits (chips).
• Integrated Circuits are transistors, resistors, and capacitors integrated together into a single “chip”
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Operating System
• Software – Instructions for Computer
• Operating system is set of instructions loaded each time a computer is started
• Program is instructions loaded when needed
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Third Generation – 1964-1971
• 1964-1971
• Integrated Circuit
• Operating System
• Getting smaller, cheaper
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The First Microprocessor – 1971
• The 4004 had 2,250 transistors
• four-bit chunks (four 1’s or 0’s)
• 108Khz
• Called “Microchip”
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What is a Microchip?
• Very Large Scale Integrated Circuit (VLSIC)– Transistors, resistors, and capacitors
• 4004 had 2,250 transistors
• Pentium IV has 42 MILLION transistors– Each transistor 0.13 microns (10-6 meters)
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4th Generation – 1971-present
• MICROCHIPS!
• Getting smaller and smaller, but we are still using microchip technology
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Birth of Personal Computers - 1975
• 256 byte memory (not Kilobytes or Megabytes)
• 2 MHz Intel 8080 chips
• Just a box with flashing lights
• cost $395 kit, $495 assembled.
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Generations of Electronic Computers First
Generation Second Gen.
Third Gen.
Fourth Gen.
Technology Vacuum Tubes
Transistors Integrated Circuits (multiple transistors)
Microchips (millions of transistors)
Size Filled Whole Buildings
Filled half a room
Smaller Tiny - Palm Pilot is as powerful as old building sized computer
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Over the past 50 years, the Electronic Computer has evolved rapidly.
Connections:
• Which evolved from the other, which was an entirely new creation
• vacuum tube
• integrated circuit
• transistor
• microchip
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Evolution of Electronics
Vacuum Tube
Transistor
Integrated Circuit
Microchip (VLSIC)
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Evolution of Electronics
• Vacuum Tube – a dinosaur without a modern lineage
• Transistor Integrated Circuit Microchip
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IBM PC - 1981
• IBM-Intel-Microsoft joint venture• First wide-selling personal
computer used in business• 8088 Microchip - 29,000 transistors
– 4.77 Mhz processing speed
• 256 K RAM (Random Access Memory) standard
• One or two floppy disk drives
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Apple Computers
• Founded 1977• Apple II released 1977
– widely used in schools
• Macintosh (left)– released in 1984, Motorola 68000
Microchip processor– first commercial computer with
graphical user interface (GUI) and pointing device (mouse)
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Computers Progress UNIVAC
(1951-1970) (1968 vers.)
Mits Altair (1975)
IBM PC (1981)
Macintosh (1984)
Pentium IV
Circuits
Integrated Circuits
2 Intel 8080 Microchip
Intel 8088 Microchip - 29,000 Transistors
Motorola 68000
Intel P-IV Microchip - 7.5 million transistors
RAM Memory
512 K 265 Bytes 256 KB 256 MB
Speed 1.3 MHz 2 KHz 4.77 MHz 3200 MHz = 3.2 GHz
Storage 100 MB Hard Drive
8” Floppy Drive
Floppy Drive
Floppy Drives
Hard Drive, Floppy, CD-Rom
Size Whole Room
Briefcase (no monitor)
Briefcase + Monitor
Two shoeboxes (integrated monitor)
Small Tower
Cost $1.6 million $750 $1595 ~$4000 $1000 - $2000
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1990s: Pentiums and Power Macs
• Early 1990s began penetration of computers into every niche: every desk, most homes, etc.
• Faster, less expensive computers paved way for this• Windows 95 was first decent GUI for “PCs”• Macs became more PC compatible - easy file transfers• Prices have plummeted
– $2000 for entry level to $500
– $6000 for top of line to $1500
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21st Century Computing
• Great increases in speed, storage, and memory
• Increased networking, speed in Internet
• Widespread use of CD-RW
• PDAs
• Cell Phone/PDA
• WIRELESS!!!
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Evolution of Dr. U’s Computer
1990 2004 Factor
Speed 16 MHz 2 GHz 125x
Storage 20 MB 120 GB 6000x
Memory 1 MB 1 GB MB 1000x
Cost $2250 $750 .33x
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What’s next for computers?
• Use your imagination to come up with what the next century holds for computers. – What can we expect in two years?– What can we expect in twenty years?