Timeline of Operating Systems - 1990s

1990s

• 1990
  • AmigaOS 2.0
  • BeOS (v1)
  • Genera 8.0
  • OS/2 1.3
  • OSF/1
  • AIX 3.0
  • Windows 3.0
• 1991
  • Linux
  • Mac OS (System 7)
  • MINIX 1.5
  • PenPoint OS
  • RISC OS 3
• 1992
  • 386BSD 0.1
  • AmigaOS 3.0
  • Amiga Unix 2.01 (Latest stable release)
  • RSTS/E 10.1 (Last stable release, September 1992)
  • Solaris 2.0 (Successor to SunOS 4.x; based on SVR4 instead of BSD)
  • OpenVMS V1.0 (First OpenVMS AXP (Alpha) specific version, November 1992)
  • OS/2 2.0 (First i386 32 bit based version)
  • Plan 9 First Edition (First public release was made available to universities)
  • Windows 3.1
• 1993
  • FreeBSD
  • NetBSD
  • Newton OS
  • Windows NT 3.1 (First Windows NT kernel public release)
  • Open Genera 1.0
  • IBM 4690 Operating System
  • Novell NetWare 4
  • OS/2 2.1
  • Slackware 1.0
  • Spring
• 1994
  • AIX 4.0, 4.1
  • OS/2 3.0
  • RISC OS 3.5
  • NetBSD 1.0 (First multi-platform release, October 1994)
• 1995
  • Digital UNIX (aka Tru64 UNIX)
  • OpenBSD
  • OS/390
  • Plan 9 Second Edition (Commercial second release version was made available to the general public)
  • Ultrix 4.5 (Last major release)
  • Windows 95
• 1996
  • Mac OS 7.6 (First officially-named Mac OS)
  • Windows NT 4.0
  • RISC OS 3.6
  • AIX 4.2
  • OS/2 4.0
  • Palm OS
• 1997
  • Inferno
  • Mac OS 8
  • SkyOS
  • MINIX 2.0
  • RISC OS 3.7
  • AIX 4.3
• 1998
  • Solaris 7 (First 64-bit Solaris release. Names from this point drop "2.", otherwise would've been Solaris 2.7)
  • Windows 98
  • RT-11 5.7 (Last stable release, October 1998)
  • Novell NetWare 5
  • JUNOS
• 1999
  • AROS (Boot for the first time in Stand Alone version)
  • RISC OS 4
  • Mac OS 9
  • OS/2 4.5
  • Windows 98 (2nd edition)
  • Inferno Second Edition (Last distribution (Release 2.3, ca. July 1999) from Lucent's Inferno Business Unit)