1

What is an Operating System?An operating system is software, consisting of programs and data, that runs on computers, manages computer hardware resources, and provides common services for execution of various application software.

http://en.wikipedia.org/wiki/Software

http://en.wikipedia.org/wiki/Computer_program

http://en.wikipedia.org/wiki/Data

http://en.wikipedia.org/wiki/Computer

http://en.wikipedia.org/wiki/Computer_hardware

http://en.wikipedia.org/wiki/Application_software

What is an Operating System?An operating system is the software that manages computer’s hardware and provides a convenient and safe environment for running programs. It acts an interface between programs and hardware resources that these program access ( like memory, hard disk and printer).

Functions of an Operating System

Examples of popular modern

operating systems

Mac OS X Mac OS X Linux Linux

FedoraFedora

http://en.wikipedia.org/wiki/File:Tux.svg

http://en.wikipedia.org/wiki/File:Fedora_line_drawing.svg

http://en.wikipedia.org/wiki/File:OpenSUSE_official-logo-color.svg

http://en.wikipedia.org/wiki/File:Debian-OpenLogo.svg

http://www.google.co.in/imgres?imgurl=http://laptoping.com/wp-content/mac_os_x_10_5_leopard.jpg&imgrefurl=http://laptoping.com/category/mac-os-x/&usg=__ZdFxwnnY9OPMFA-oFvrxb7LYJRU=&h=460&w=480&sz=63&hl=en&start=1&zoom=1&itbs=1&tbnid=yCl5nFD2Y3GDMM:&tbnh=124&tbnw=129&prev=/search%3Fq%3DMac%2BOS%2BX%26hl%3Den%26biw%3D1440%26bih%3D783%26gbv%3D2%26tbm%3Disch&ei=2aolTu7gGpHzrQeF_MWsCQ

http://en.wikipedia.org/wiki/File:Windows_logo.svg

http://en.wikipedia.org/wiki/File:OpenSUSE_11.4_KDE_Plasma_desktop.png

http://en.wikipedia.org/wiki/File:Windows_7.png

http://en.wikipedia.org/wiki/File:Snow_Leopard_Desktop.png





The UNIX Operating SystemUnix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna. The Unix OS Initial release in 1969. The Unix operating system was first developed in assembly language, but by 1973 had been almost entirely recoded in C Unix operating systems are widely used in servers, workstations, and mobile devices

Bell Laboratories at Murray Hill, New Jersey Bell Laboratories at Murray Hill, New Jersey Thompson (left) with Dennis RitchieThompson (left) with Dennis Ritchie

http://en.wikipedia.org/wiki/Computer_multitasking

http://en.wikipedia.org/wiki/Multi-user

http://en.wikipedia.org/wiki/Operating_system

http://en.wikipedia.org/wiki/American_Telephone_%26_Telegraph

http://en.wikipedia.org/wiki/Bell_Labs

http://en.wikipedia.org/wiki/Ken_Thompson_%28computer_programmer%29

http://en.wikipedia.org/wiki/Dennis_Ritchie

http://en.wikipedia.org/wiki/Brian_Kernighan

http://en.wikipedia.org/wiki/Douglas_McIlroy

http://en.wikipedia.org/wiki/Douglas_McIlroy

http://en.wikipedia.org/wiki/Joe_Ossanna

http://en.wikipedia.org/wiki/Joe_Ossanna

http://en.wikipedia.org/wiki/Assembly_language

http://en.wikipedia.org/wiki/C_%28programming_language%29

http://en.wikipedia.org/wiki/Server_%28computing%29

http://en.wikipedia.org/wiki/Workstation

http://en.wikipedia.org/wiki/Mobile_device

http://en.wikipedia.org/wiki/File:Ken_n_dennis.jpg

http://en.wikipedia.org/wiki/File:Lucent_HQ.gif

1

Technology

Transcript of 1