Timeline: Windows DOS | Timetoast

Jun 1, 1980

Windows public beta
Period: Nov 20, 1981 to Dec 31, 2001

Windows 1.0
Period: Dec 9, 1985 to Dec 31, 2001

Windows 2.0
Period: May 22, 1987 to Dec 31, 2001

Windows 3.0
Period: Apr 6, 1989 to Dec 31, 2001

Windows 3.1
Period: Aug 15, 1995 to Dec 31, 2002

Windows 95

internally Windows 4.0
Period: May 15, 1998 to Jul 11, 2004

Windows 98

internally Windows 4.1
Period: Jun 19, 2000 to Jul 13, 2008

Windows ME

internally Windows 4.9
Period: Aug 24, 2001 to Apr 14, 2009

Windows XP

internally Windows 5.1