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
  • DOS/360 (IBM)
  • MS/8
• 1967
  • ACP (IBM)
  • CP/CMS
  • ITS
  • WAITS
• 1969
  • TENEX
  • Unix

1970s

• 1970
  • DOS/BATCH 11 (PDP-11)
• 1971
  • OS/8
• 1972
  • MFT
  • MVT
  • RDOS
  • SVS
  • VM/CMS
• 1973
  • Alto OS
  • RSX-11D
  • RT-11
  • VME
• 1974
  • MVS (MVS/XA)
• 1976
  • CP/M
  • TOPS-20
• 1978
  • Apple DOS 3.1 (first Apple OS)
  • TripOS
  • VMS
  • Lisp Machine (CADR)
• 1979
  • Apple DOS 3.2
  • POS

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
  • Lisa OS
  • Coherent
  • ProDOS
• 1984
  • Macintosh OS (System 1.0)
  • QNX
  • UniCOS
• 1985
  • AmigaOS
  • Atari TOS
  • MIPS OS
  • Microsoft Windows 1.0
• 1986
  • AIX
  • GS-OS
  • HP-UX
• 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) [1]
  • Windows NT 4.0
• 1997
  • Inferno
  • Mac OS 7.6 (first officially-named Mac OS)
  • SkyOS
• 1998
  • Mandrakelinux
  • Windows 98
• 1999
  • Mac OS 8

2000s

• 2000
  • AtheOS
  • Mac OS 9
  • Windows 2000
  • Windows Me (Millennium Edition)
• 2001
  • Mac OS X
  • Windows XP
  • z/OS
• 2002
  • Syllable
  • Red Hat Enterprise Linux
• 2003
  • Windows Server 2003
  • Fedora Core Linux FC1

External links

• http://www.levenez.com/unix/ -- Timeline of UNIX 1969 and its descendants at present