Microsoft Operating Systems

MS-DOS
See MS-DOS Article

Windows

 * Windows 1.0 (1985)
 * Windows 2.0 (1987)
 * Windows 2.1x (1988)
 * Windows 3.0 (1990)
 * Windows 3.1x (1992)
 * Windows 95 (1995)
 * Windows 98 (1998)
 * Windows ME (2000)
 * Windows XP (2001)
 * Windows Vista (2006)
 * Windows 7 (2009)
 * Windows 8 (2012)
 * Windows 8.1 (2013)
 * Windows 10 (2015)

Windows NT
All releases of Windows after Windows 2000 are a part of the Windows NT family.
 * Windows NT 3.1 (1993)
 * Windows NT 3.5 (1994)
 * Windows NT 3.51 (1995)
 * Windows NT 4.0 (1996)
 * Windows 2000 (NT 5.0) (2000)

Windows CE

 * Windows CE
 * AutoPC
 * Pocket PC 2000
 * Pocket PC 2002
 * Windows Mobile 2003
 * Windows Mobile 2003 SE
 * Windows Mobile 5
 * Windows Mobile 6
 * Smartphone 2002
 * Smartphone 2003
 * Portable Media Center
 * Zune
 * Windows Mobile

Windows Phone

 * Windows Phone 7 (2010)
 * Windows Phone 8 (2012)
 * Windows Phone 8.1 (2014)
 * Windows Mobile 10 (2015)

Xbox gaming

 * Xbox system software
 * Xbox 360 system software
 * Xbox One system software

OS/2

 * OS/2 1.0 (1987)
 * OS/2 1.1 (1988)
 * OS/2 1.2 (1989)
 * OS/2 1.3 (1990)

Other operating systems

 * MIDAS
 * Singularity
 * Xenix
 * Zune
 * Azure Sphere