DOS 6.6 gab es wohl auch - ist nun wieder etwas anderes.
download ms dos 6.6 free
DOS-on-USB - Download
Habe mal den Link von @DietmarG -
Die Schnelle Zeitleiste - etwas modifiziert.
1981 MS-DOS 1.0
1982 MS-DOS 1.1
1983 MS-DOS 2.0
1984 MS-DOS 3.0
1985 MS-DOS 3.1, Win 1.01
1986 MS-DOS 3.2, Win 1.02, Win 1.03
1987 MS-DOS 3.3, Win 1.04, Win 2.03, OS/2 1.0
1988 MS-DOS 4.0, Win 2.1, OS/2 1.1
1989 Win 2.11, OS/2 1.2
1990 OS/2 1.3, Win 3.0
1991 MS-DOS 5.0, Win 3.0 ME
1992 Win 3.1, WfW 3.1
1993 MS-DOS 6.0, Win NT 3.1, Win NT 3.1 Server, Win 3.11 WfW 3.11
1994 Win NT 3.5, Win NT 3.5 Server
1995 Win 95, Win NT 3.51, Win NT 3.51 Server, Win 95 A
1996 Win NT 4.0, Win NT 4.0 Server, Win 95 B
1997 Win 95 C
1998 Win 98
1999 Win 98 SE
2000 Win 2000, Win 2000 Server, Win ME
2001 Win XP
2002 Win XP Tablet
2003 Win Server 2003, Win XP MCE
2004 Win XP MCE 2004
2005 Win XP Tablet 2005, Win XP MCE 2005
2006 Win Vista
2008 Win Server 2008
2009 Win 7, Win Server 2008 r2
2012 Win 8, Win Server 2012
2013 Win 8.1, Win Server 2012 r2