MS-DOS v1.25 and v2.0 is now open-source (2014)
MS-DOS v1.25 and v2.0 is now open-source (2014)

github.com
GitHub - microsoft/MS-DOS: The original sources of MS-DOS 1.25 and 2.0, for reference purposes

MS-DOS v1.25 and v2.0 is now open-source (2014)
GitHub - microsoft/MS-DOS: The original sources of MS-DOS 1.25 and 2.0, for reference purposes