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Operating systems timeline

This article presents a timeline of events in the history of computer operating systems from 1960 to 2003. For a narrative explaining the overall developments, see the related History of computing hardware.

1960s

1961
- CTSS
1964
- OS/360 (announced)
1965
- Multics (announced)
- OS/360 (shipped)
- Tape Operating System (TOS)
1966
- MS/8
1967
1969
- ACP (IBM)
- TENEX
- Unix

1970s

1970
- DOS/BATCH 11 (PDP-11)
1971
- OS/8
1972
- MFT
- MVT
- RDOS
- SVS
- VM/CMS
1973
1974
- MVS (MVS/XA)
1976
- CP/M
- TOPS-20
1978
- Apple DOS 3.1 (first Apple OS)
- TripOS
- VMS
1979
- Apple DOS 3.2

1980s

1980
- Apple DOS 3.3
- OS-9
- QDOS
- SOS
- XDE (Tajo) (Xerox Development Environment)
- Xenix
1981
- MS-DOS
1982
- SunOS (1.0)
- Ultrix
1983
1984
- Macintosh OS (System 1.0)
- QNX
- UniCOS
1985
1986
1987
- Arthur
- IRIX (3.0 is first SGI version)
- Minix
- OS/2 (1.0)
- Microsoft Windows 2.0
1988
- A/UX (Apple Computer)
- LynxOS
- MVS/ESA
- OS/400
1989
- NeXTSTEP (1.0)
- RISC OS
- SCO Unix (release 3)

1990s

1990
- BeOS (v1)
- OSF/1
1991
- Linux
1992
- Solaris (2.0 is first not called SunOS)
- Windows 3.1
1993
- Plan 9
- FreeBSD
- NetBSD
- Slackware Linux
- Windows NT 3.1 (First version of NT)
1994
- Red Hat Linux
1995
- Digital Unix (aka Tru64 )
- OpenBSD
- OS/390
- Windows 95
1996
- Debian GNU/Linux (Debian 1.1)
- Windows NT 4.0
1997
- Mac OS 7.6 (first officially-named Mac OS)
- SkyOS
1998
- Windows 98
1999
- Mac OS 8

2000s


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