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New Anna University (UG / PG) Nov/Dec 2016 and Jan 2017 Theory , Practical Exam Timetable
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Types of Operating Systems

OS is a system software which manage the computer hardware.
It provides basis for application software and it act as intermediary between user and computer hardware.
1.Command Line OS
2.Graphical User Interface OS
[Image: OxU1T.jpg]
Command Line OS:
User interaction with computer by using commands and the response according to the respective command!
Eg: Disk Operating Systems (DOS)
Graphical User Interface OS:
User interaction with computer by using mouse and keyboard.
Eg: Windows OS, Linux,Unix,Mac.
Different versions of OS:
1.Microsoft Windows:
First version of Windows OS released in 1985 and most widely used are
  • Windows 8*
  • Windows 7
  • Windows Vista
  • Windows XP
2.Apple Mac OS
In 1984 launch a Macintosh Personal Computer and the Mac first version released in 1999.
Versions are:
  • Mac OS X Server 1.0 (Hera)
  • Public Beta (Kodiak)
  • Mac OS X Version 10.0 (Cheetah)
  • Mac OS X Version 10.1 (Puma)
  • Mac OS X Version 10.2 (Jaguar)
  • Mac OS X Version 10.3 (Panther)
  • Mac OS X Version 10.4 (Tiger)
  • Mac OS X Version 10.5 (Leopard)
  • Mac OS X Version 10.6 (Snow Leopard)
  • Mac OS X Version 10.7 (Lion)
  • Mac OS X Version 10.8 (Mountain Lion)
[Image: ShtZY.png]
3.Unix OS:
Its a self contained, multitasking and multi user OS released in 1969
4.Linux OS:
Its a Open Source OS and which is popular for Server and Desktop OS.
  • Ubuntu
  • Debian
  • Fedora
  • CentOS
  • RedHat
  • Freespire

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