Desktop/Server
| Date | 16-bit | 32-bit | 64-bit | Codename |
|---|---|---|---|---|
| 20 November 1985 | Windows 1.0 | |||
| 9 December 1987 | Windows 2.0 | |||
| 27 May 1988 | Windows 2.10 | |||
| 13 March 1989 | Windows 2.11 | |||
| 22 May 1990 | Windows 3.0 | |||
| 6 April 1992 | Windows 3.1 | Janus | ||
| 27 October 1992 | Windows for Workgroups 3.1 | Kato, Sparta | ||
| 27 July 1993 | Windows NT 3.1 | NT OS/2 | ||
| 8 November 1993 | Windows for Workgroups 3.11 | Snowball (LB) | ||
| 21 September 1994 | Windows NT 3.5 | Daytona | ||
| 30 May 1995 | Windows NT 3.51 | Daytona | ||
| 24 August 1995 | Windows 95 | Chicago | ||
| 24 August 1996 | Windows NT 4.0 | SUR, Cairo | ||
| 25 June 1998 | Windows 98 | Memphis | ||
| 5 May 1999 | Windows 98 SE | |||
| 17 February 2000 | Windows 2000 | For SP1 Asteroid | ||
| 14 September 2000 | Windows ME | Millennium | ||
| 25 October 2001 | Windows XP | Whistler | ||
| 31 October 2002 | Windows XP Media Center Edition | Freestyle | ||
| 24 April 2003 | Windows Server 2003 | Whistler Server | ||
| 30 September 2003 | Windows XP Media Center Edition 2004 | Harmony | ||
| 12 October 2004 | Windows XP Media Center Edition 2005 | Symphony | ||
| 25 April 2005 | Windows XP Professional x64 Edition | |||
| 8 July 2006 | Windows Fundamentals for Legacy PCs | Eiger | ||
| 8 November 2006 | Windows Vista for Business use | Longhorn | ||
| 30 January 2007 | Windows Vista for Home use; released in fifty countries | Longhorn | ||
| 7 November 2007 | Windows Home Server | Quattro | ||
| 27 February 2008 | Windows Server 2008 | Longhorn Server | ||
| 22 July 2009 | Windows 7 | 7(Vienna) | ||
| 22 October 2009 | Windows Server 2008 R2 | Windows Server 7 | ||
| 6 April 2011 | Windows Home Server 2011 | Vail | ||
| 4 September 2012 | Windows Server 2012 | Windows Server 8 | ||
| 26 October 2012 | Windows 8 | 8(Metro/vNext) | ||
| 26 March 2013 | Windows 8.1 | 8(Metro/vNext) | ||
| Date | 16-bit | 32-bit | 64-bit | Codename |
Read more about this topic: Timeline Of Microsoft Windows