List of Windows operation system

Windows original

 * Windows 1.0 (1985)
 * Windows 2.0 (1987)
 * Windows 2.1 (1989)
 * Windows 3.0 (1990)
 * Windows 3.1 (1992)
 * Windows 95 (1995)
 * Windows 98 (1998)
 * Windows 2000 (2000)
 * Windows ME (2000)
 * Windows XP (2001)
 * Windows Vista (2007)
 * Windows 7 (2009)
 * Windows 8 (2012)
 * Windows 8.1 (2013)
 * Windows 10 (2015)
 * Windows 11 (2021)

Windows Server

 * Windows Server 2003 (2003)
 * Windows Server 2008 (2008)
 * Windows home Server 2011 (2011)
 * Windows Server 2012 (2012)
 * Windows Server 2016 (2016)
 * Windows Server 2019 (2019)

Cancelled

 * Windows Cairo
 * Windows Nashville
 * Windows Neptune
 * Windows Odessey
 * Windows Whistler
 * Windows Longhorn
 * Windows 10X

Windows Pocket PC,

 * Windows Pocket PC 2000 (2000)
 * Windows Pocket PC 2002 (2002)

NT series

 * Windows NT 3.1 (1993)
 * Windows NT 3.5 (1994)
 * Windows NT 3.51 (1995)
 * Windows NT 4.0 (1996)
 * Windows 2000 (2000)