Microsoft DOS History

Updated: 05/21/2018 by Computer Hope
Year Event
1981 Microsoft bought the rights for QDOS from Seattle Computer Products (SCP) for $25,000 on July 27, 1981.
1981 MS-DOS 1.0 (the first version) was released in August 1981.
1982 MS-DOS 1.25 was released in August 1982.
1983 MS-DOS 2.0 was released in March 1983.
1984 Microsoft introduces MS-DOS 3.0 for the IBM PC AT and MS-DOS 3.1 for networks.
1986 MS-DOS 3.2 was released in April 1986.
1987 MS-DOS 3.3 was released in April 1987.
1988 MS-DOS 4.0 was released in July 1988.
1988 MS-DOS 4.01 was released in November 1988.
1991 MS-DOS 5.0 was released in June 1991.
1993 MS-DOS 6.0 was released in August 1993.
1993 MS-DOS 6.2 was released in November 1993.
1994 MS-DOS 6.21 was released in March 1994.
1994 MS-DOS 6.22 was released in April 1994.

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