Operating systems

Windows XPAn 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 and software programs would be useless. The picture to the right is an example of Microsoft Windows XP, a popular operating system and what the box may look like if you were to purchase it from a local retail store.

Operating System types
Operating System overviews
Troubleshooting
Operating System Q&A
Operating System definitions
Apple news
Linux and Unix news
Microsoft news

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.

System 7.x
Windows 98
Windows CE

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.

Linux
Unix
Windows 2000

Multiprocessing - An operating system capable of supporting and utilizing more than one computer processor. Below are some examples of multiprocessing operating systems.

Linux
Unix
Windows 2000

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.

Linux
Unix
Windows 2000

Multithreading - Operating systems that allow different parts of a software program to run concurrently. Operating systems that would fall into this category are:

Linux
Unix
Windows 2000

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 its corrisponding operating system page.

Linux and Variants
Mac OS
MS-DOS
IBM OS/2 Warp
Unix and Variants
Windows CE
Windows 3.x
Windows 95
Windows 98

Windows 98 SE
Windows ME
Windows NT
Windows 2000
Windows XP
Windows Vista
Windows 7
Windows 8
Windows 8.1

Operating system listing

Below is a listing of many of the different operating systems available today, the dates they were released, the platforms they have been developed for and who developed them.

Operating system Date first released Platform Developer
AIX and AIXL Unix and Linux history. Various IBM
AmigaOS Currently no AmigaOS history. Amiga Commodore
Android November 5, 2007 Mobile Google
BSD Unix and Linux history. Various BSD
Caldera Linux Unix and Linux history. Various SCO
Corel Linux Unix and Linux history. Various Corel
Debian Linux Unix and Linux history. Various GNU
DUnix Unix and Linux history. Various Digital
DYNIX/ptx Unix and Linux history. Various IBM
HP-UX Unix and Linux history. Various Hewlett Packard
iOS 2010 Mobile Apple
IRIX Unix and Linux history. Various SGI
Kondara Linux Unix and Linux history. Various Kondara
Linux Unix and Linux history. Various Linus Torvalds
MAC OS 8 Apple operating system history. Apple Macintosh Apple
MAC OS 9 Apple operating system history. Apple Macintosh Apple
MAC OS 10 Apple operating system history. Apple Macintosh Apple
MAC OS X Apple operating system history. Apple Macintosh Apple
Mandrake Linux Unix and Linux history. Various Mandrake
MINIX Unix and Linux history. Various MINIX
MS-DOS 1.x MS-DOS history. IBM Microsoft
MS-DOS 2.x MS-DOS history. IBM Microsoft
MS-DOS 3.x MS-DOS history. IBM Microsoft
MS-DOS 4.x MS-DOS history. IBM Microsoft
MS-DOS 5.x MS-DOS history. IBM Microsoft
MS-DOS 6.x MS-DOS history. IBM Microsoft
NEXTSTEP Apple operating system history. Various Apple
OS/2 1987 IBM IBM
OSF/1 Unix and Linux history. Various OSF
QNX Unix and Linux history. Various QNX
Red Hat Linux Unix and Linux history. Various Red Hat
SCO Unix and Linux history. Various SCO
Slackware Linux Unix and Linux history. Various Slackware
Sun Solaris Unix and Linux history. Various Sun
SuSE Linux Unix and Linux history. Various SuSE
System 1 Apple operating system history. Apple Macintosh Apple
System 2 Apple operating system history. Apple Macintosh Apple
System 3 Apple operating system history. Apple Macintosh Apple
System 4 Apple operating system history. Apple Macintosh Apple
System 6 Apple operating system history. Apple Macintosh Apple
System 7 Apple operating system history. Apple Macintosh Apple
System V Unix and Linux history. Various System V
Tru64 Unix Unix and Linux history. Various Digital
Turbolinux Unix and Linux history. Various Turbolinux
Ultrix Unix and Linux history. Various Ultrix
Unisys Unix and Linux history. Various Unisys
Unix Unix and Linux history. Various Bell labs
UnixWare Unix and Linux history. Various UnixWare
VectorLinux Unix and Linux history. Various VectorLinux
Windows 2000 Microsoft Windows history. IBM Microsoft
Windows 2003 Microsoft Windows history. IBM Microsoft
Windows 3.X Microsoft Windows history. IBM Microsoft
Windows 8 Microsoft Windows history. IBM Microsoft
Windows 7 Microsoft Windows history. IBM Microsoft
Windows 95 Microsoft Windows history. IBM Microsoft
Windows 98 Microsoft Windows history. IBM Microsoft
Windows CE Microsoft Windows history. PDA Microsoft
Windows ME Microsoft Windows history. IBM Microsoft
Windows NT Microsoft Windows history. IBM Microsoft
Windows Vista Microsoft Windows history. IBM Microsoft
Windows XP Microsoft Windows history. IBM Microsoft
Xenix Unix and Linux history. Various Microsoft

Common operating system Q&A

Reference Questions
CH000181 Missing operating system.
CH000575 Linux vs. Windows
CH000619 Command line vs. GUI.
CH000643 How do I determine what operating system I'm using?
Q&A See the Q&A section for a complete listing of more specific OS questions.
Forum If your question is not listed here try our computer help forum.

Additional information

  • See our operating system definition for further information and related links on this term.