Timeline: microsoft | Timetoast

Nov 20, 1985

windows 1

x86 – 16-bit
Dec 9, 1987

windows 2

x86 – 16-bit
May 27, 1988

wondows 2.10

x86 – 16-bit
Mar 13, 1989

windows 2.11

x86 – 16-bit
May 22, 1990

Windows 3.0

x86 – 16-bit
Oct 20, 1991

Windows 3.0 with Multimedia Extensions

x86 – 16-bit
Apr 6, 1992

Windows 3.1

x86 – 16-bit
Oct 27, 1992

Windows for Workgroups 3.1

x86 – 16-bit
Jul 27, 1993

Windows NT 3.1

IA-32, DEC Alpha, MIPS
Nov 8, 1993

Windows for Workgroups 3.11

x86 – 16-bit
Sep 21, 1994

Windows NT 3.5

IA-32, DEC Alpha, MIPS
May 30, 1995

Windows NT 3.51

IA-32, DEC Alpha, MIPS, PowerPC
Aug 24, 1995

Windows 95

IA-32
Aug 24, 1996

Windows NT 4.0

IA-32, DEC Alpha, MIPS, PowerPC
Jun 25, 1998

Windows 98

IA-32
May 5, 1999

Windows 98 SE

IA-32
Feb 17, 2000

Windows 2000

IA-32
Sep 14, 2000

Windows ME

IA-32
Oct 21, 2001

Windows XP

IA-32
Oct 25, 2001

Windows XP 64-Bit Edition (v2002)

Itanium
Oct 31, 2002

Windows XP Media Center Edition

IA-32
Mar 28, 2003

Windows XP 64-Bit Edition (v2003)

Itanium
Apr 24, 2003

Windows XP 64-Bit Edition (v2002)

Itanium
Apr 24, 2003

Windows Server 2003

IA-32, x64, Itanium
Sep 30, 2003

Windows XP Media Center Edition 2004

IA-32
Oct 12, 2004

Windows XP Media Center Edition 2005

IA-32
Apr 25, 2005

Windows XP Professional x64 Edition
Nov 8, 2006

Windows Vista

IA-32, x64
Jul 22, 2009

Windows 7

IA-32, x64
Oct 26, 2012

Windows 8

IA-32, x64
Oct 18, 2013

Windows 8.1

IA-32, x64