Microsoft OS/2 1.0
Microsoft OS/2 1.2
Microsoft OS/2 1.3
IBM OS/2 1.0
IBM OS/2 1.1
IBM OS/2 1.2
IBM OS/2 1.3
IBM OS/2 2.0
IBM OS/2 2.1
IBM OS/2 2.11
IBM OS/2 Warp 3.0
IBM OS/2 Warp 4.0
QDOS 0.10....................September 1980 CP/M-86.......................December 1980
MS-DOS 1.14.......................July 1981
PC-DOS 1.0......................August 1981 PC DOS 1.1.........................May 1982
MS-DOS 1.25........................May 1982
MS-DOS 2.0.......................March 1983 PC DOS 2.0.......................March 1983 PC DOS 2.1.....................October 1983
MS-DOS 2.11......................March 1984
MS-DOS 3.0......................August 1984 PC DOS 3.0...................September 1984
MS-DOS 3.1....................November 1984 PC DOS 3.1.......................March 1985 PC DOS 3.2....................December 1985 MS-DOS 3.2.....................January 1986 PC DOS 3.3.......................April 1987 MS-DOS 3.3......................August 1987
DR-DOS 3.31........................May 1988 MS-DOS 4.0........................June 1988 PC DOS 4.0........................July 1988 MS-DOS 4.01...................December 1988 DR-DOS 5.0.........................May 1990 PC DOS 5.0.........................May 1991 MS-DOS 5.0........................June 1991 DR-DOS 6.0...................September 1991 MS-DOS 6.0.......................March 1993 PC DOS 6.1........................June 1993 MS-DOS 6.2....................November 1993 Novell DOS 7..................December 1993 MS-DOS 6.21...................February 1994 PC DOS 6.3.......................April 1994 MS-DOS 6.22.......................June 1994 PC DOS 7.0.......................April 1995 PC DOS 2000......................April 1998