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OPERATING SYSTEM


Operating systems

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Operating system ABCs
An operating system, or OS, is a software program that enables the computer hardware to communicate and operate with the computer software. Without a computer operating system, a computer would be useless.
Operating system types
As computers have progressed and developed so have the operating systems. Below is a basic list of the different operating systems and a few examples of operating systems that fall into each of the categories. Many computer operating systems will fall into more than one of the below categories.
GUI - Short for Graphical User Interface, a GUI Operating System contains graphics and icons and is commonly navigated by using a computer mouse. See the GUI definition for a complete definition. Below are some examples of GUI Operating Systems.
Multi-user - A multi-user operating system allows for multiple users to use the same computer at the same time and different times. See the multi-user definition for a complete definition for a complete definition. Below are some examples of multi-user operating systems.
Multiprocessing - An operating system capable of supporting and utilizing more than one computer processor. Below are some examples of multiprocessing operating systems.
Multitasking - An operating system that is capable of allowing multiple software processes to run at the same time. Below are some examples of multitasking operating systems.
Multithreading - Operating systems that allow different parts of a software program to run concurrently. Operating systems that would fall into this category are:
Troubleshooting
Common questions and answers to operating systems in general can be found on the below operating system question and answers. All other questions relating to an operating system in particular can be found through the operating system page.
Operating system listing
Below is a listing of many of the different operating systems available today, the dates they were released, theplatforms they have been developed for and who developed them.
Operating systemDate first releasedPlatformDeveloper
AIX / AIXLUnix / Linux history.VariousIBM
AmigaOSCurrently no AmigaOS history.AmigaCommodore
BSDUnix / Linux history.VariousBSD
Caldera LinuxUnix / Linux history.VariousSCO
Corel LinuxUnix / Linux history.VariousCorel
Debian LinuxUnix / Linux history.VariousGNU
DUnixUnix / Linux history.VariousDigital
DYNIX/ptxUnix / Linux history.VariousIBM
HP-UXUnix / Linux history.VariousHewlett Packard
IRIXUnix / Linux history.VariousSGI
Kondara LinuxUnix / Linux history.VariousKondara
LinuxUnix / Linux history.VariousLinus Torvalds
MAC OS 8Apple operating system history.Apple MacintoshApple
MAC OS 9Apple operating system history.Apple MacintoshApple
MAC OS 10Apple operating system history.Apple MacintoshApple
MAC OS XApple operating system history.Apple MacintoshApple
Mandrake LinuxUnix / Linux history.VariousMandrake
MINIXUnix / Linux history.VariousMINIX
MS-DOS 1.xMS-DOS history.IBM / PCMicrosoft
MS-DOS 2.xMS-DOS history.IBM / PCMicrosoft
MS-DOS 3.xMS-DOS history.IBM / PCMicrosoft
MS-DOS 4.xMS-DOS history.IBM / PCMicrosoft
MS-DOS 5.xMS-DOS history.IBM / PCMicrosoft
MS-DOS 6.xMS-DOS history.IBM / PCMicrosoft
NEXTSTEPApple operating system history.VariousApple
OSF/1Unix / Linux history.VariousOSF
QNXUnix / Linux history.VariousQNX
Red Hat LinuxUnix / Linux history.VariousRed Hat
SCOUnix / Linux history.VariousSCO
Slackware LinuxUnix / Linux history.VariousSlackware
Sun SolarisUnix / Linux history.VariousSun
SuSE LinuxUnix / Linux history.VariousSuSE
System 1Apple operating system history.Apple MacintoshApple
System 2Apple operating system history.Apple MacintoshApple
System 3Apple operating system history.Apple MacintoshApple
System 4Apple operating system history.Apple MacintoshApple
System 6Apple operating system history.Apple MacintoshApple
System 7Apple operating system history.Apple MacintoshApple
System VUnix / Linux history.VariousSystem V
Tru64 UnixUnix / Linux history.VariousDigital
TurbolinuxUnix / Linux history.VariousTurbolinux
UltrixUnix / Linux history.VariousUltrix
UnisysUnix / Linux history.VariousUnisys
UnixUnix / Linux history.VariousBell labs
UnixWareUnix / Linux history.VariousUnixWare
VectorLinuxUnix / Linux history.VariousVectorLinux
Windows 2000Microsoft Windows history.IBM / PCMicrosoft
Windows 2003Microsoft Windows history.IBM / PCMicrosoft
Windows 3.XMicrosoft Windows history.IBM / PCMicrosoft
Windows 7Microsoft Windows history.IBM / PCMicrosoft
Windows 95Microsoft Windows history.IBM / PCMicrosoft
Windows 98Microsoft Windows history.IBM / PCMicrosoft
Windows CEMicrosoft Windows history.PDAMicrosoft
Windows MEMicrosoft Windows history.IBM / PCMicrosoft
Windows NTMicrosoft Windows history.IBM / PCMicrosoft
Windows VistaMicrosoft Windows history.IBM / PCMicrosoft
Windows XPMicrosoft Windows history.IBM / PCMicrosoft
XenixUnix / Linux history.VariousMicrosoft
Common operating system questions and answers
ReferenceIssue / Question
CH000575Linux vs. Windows
CH000619Command line vs. GUI.
CH000643How do I determine what operating system I'm using?
Q&ASee the Q&A section for a complete listing of more specific OS questions.
ForumIf your question is not listed here try our computer help forum.
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