<P> This article presents a timeline of events in the history of Microsoft Windows operating systems from 1985 . </P> <Table> <Tr> <Th> Release date </Th> <Th> Title </Th> <Th> Architectures </Th> <Th> Based Upon </Th> </Tr> <Tr> <Th> 20 November 1985 </Th> <Td> Windows 1.0 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 9 December 1987 </Th> <Td> Windows 2.0 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 27 May 1988 </Th> <Td> Windows 2.10 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 13 March 1989 </Th> <Td> Windows 2.11 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 22 May 1990 </Th> <Td> Windows 3.0 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 20 October 1991 </Th> <Td> Windows 3.0 with Multimedia Extensions </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 6 April 1992 </Th> <Td> Windows 3.1 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 27 October 1992 </Th> <Td> Windows for Workgroups 3.1 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 27 July 1993 </Th> <Td> Windows NT 3.1 </Td> <Td> IA - 32, DEC Alpha, MIPS </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 8 November 1993 </Th> <Td> Windows for Workgroups 3.11 </Td> <Td> x86--16 - bit </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 21 September 1994 </Th> <Td> Windows NT 3.5 </Td> <Td> IA - 32, DEC Alpha, MIPS </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 30 May 1995 </Th> <Td> Windows NT 3.51 </Td> <Td> IA - 32, DEC Alpha, MIPS, PowerPC </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 24 August 1995 </Th> <Td> Windows 95 </Td> <Td> IA - 32 </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 24 August 1996 </Th> <Td> Windows NT 4.0 </Td> <Td> IA - 32, DEC Alpha, MIPS, PowerPC </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 25 June 1998 </Th> <Td> Windows 98 </Td> <Td> IA - 32 </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 5 May 1999 </Th> <Td> Windows 98 SE </Td> <Td> IA - 32 </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 17 February 2000 </Th> <Td> Windows 2000 </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 14 September 2000 </Th> <Td> Windows ME </Td> <Td> IA - 32 </Td> <Td> MS - DOS </Td> </Tr> <Tr> <Th> 25 October 2001 </Th> <Td> Windows XP </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 25 October 2001 </Th> <Td> Windows XP 64 - Bit Edition (v2002) </Td> <Td> Itanium </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 31 October 2002 </Th> <Td> Windows XP Media Center Edition </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 28 March 2003 </Th> <Td> Windows XP 64 - Bit Edition (v2003) </Td> <Td> Itanium </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 24 April 2003 </Th> <Td> Windows Server 2003 </Td> <Td> IA - 32, x64, Itanium </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 30 September 2003 </Th> <Td> Windows XP Media Center Edition 2004 </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 12 October 2004 </Th> <Td> Windows XP Media Center Edition 2005 </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 25 April 2005 </Th> <Td> Windows XP Professional x64 Edition </Td> <Td> x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 6 December 2005 </Th> <Td> Windows Server 2003 R2 </Td> <Td> IA - 32, x64, Itanium </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 8 July 2006 </Th> <Td> Windows Fundamentals for Legacy PCs </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 30 November 2006 </Th> <Td> Windows Vista for Business use </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 30 January 2007 </Th> <Td> Windows Vista for Home use; released in fifty countries </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 7 November 2007 </Th> <Td> Windows Home Server </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 27 February 2008 </Th> <Td> Windows Server 2008 </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 22 October 2009 </Th> <Td> Windows 7 </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 22 October 2009 </Th> <Td> Windows Server 2008 R2 </Td> <Td> x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 6 April 2011 </Th> <Td> Windows Home Server 2011 </Td> <Td> x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 1 July 2011 </Th> <Td> Windows Thin PC </Td> <Td> IA - 32 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 4 September 2012 </Th> <Td> Windows Server 2012 </Td> <Td> x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 26 October 2012 </Th> <Td> Windows 8 </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 26 October 2012 </Th> <Td> Windows RT </Td> <Td> ARM </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 18 October 2013 </Th> <Td> Windows 8.1 </Td> <Td> IA - 32, x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 18 October 2013 </Th> <Td> Windows RT 8.1 </Td> <Td> ARM </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 18 October 2013 </Th> <Td> Windows Server 2012 R2 </Td> <Td> x64 </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 29 July 2015 </Th> <Td> Windows 10 </Td> <Td> IA - 32, x64, ARM </Td> <Td> Windows NT </Td> </Tr> <Tr> <Th> 27 September 2016 </Th> <Td> Windows Server 2016 </Td> <Td> x64 </Td> <Td> Windows NT </Td> </Tr> </Table> <Tr> <Th> Release date </Th> <Th> Title </Th> <Th> Architectures </Th> <Th> Based Upon </Th> </Tr>

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