OS By SeriaAeya Jan 1, 1965 Multics Period: Jan 1, 1965 to Jan 1, 2013 Operativ system Period: Jan 1, 1968 to Jan 1, 1985 Markus Andersson & Jens Nilsson Jan 1, 1969 UNICS Jan 1, 1971 UNIX V1 Jan 1, 1978 Apple DOS 3.1 Jan 1, 1978 1BSD Jan 1, 1978 2BSD Jan 1, 1981 MS DOS 1.0 Jan 1, 1983 MS DOS 2.0 Jan 1, 1984 MS DOS 3.0 Jan 1, 1985 Windows 1 Jan 1, 1991 Linux 0.01 Jan 1, 1993 Windows NT 3.1 Jan 1, 1993 FreeBSD Jan 1, 1995 Windows 95 Jan 1, 1995 MS DOS 7.0 Jan 1, 1996 OpenBSD 1.2 Jan 1, 1998 Windows 98 Jan 1, 2000 FreeBSD 4 Jan 1, 2001 Windows XP Jan 1, 2004 DragonFly BSD 1.0 Jan 1, 2006 FreeDOS 1.0 Jan 30, 2007 Windows Vista Jan 1, 2008 Windows Server 2008 Jan 1, 2008 DragonFly BSD 2.0 Jan 1, 2009 Windows 7 Jan 1, 2011 Linux 3.0 Jan 1, 2011 OpenBSD 5 Jan 1, 2011 DragonFly 2.10 Jan 12, 2012 FreeBSD 9