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MS-DOS compatible operating systems

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As a family of operating systems, the MS-DOS family include DR-DOS, PC-DOS, FreeDOS and the multiuser versions.

Operating Systems in MS-DOS platform Edit

Name Users Version(s) Producer(s) Region(s) Notes
Concurrent DOS Multi 3.1, 6.0 DR and later CCI World wide Evolved from Concurrent CP/M
DOS+ Single DR World Wide Actually more like a version of CP/M-86 that could run MS-DOS software
DR-DOS Single 5.0, 6.0, Caldera 7.02, 7.03, 7.04, 7.05, 8.0 DR, Caldera, Lineo World Wide Evolved from Concurrent DOS
FreeDOS Single FreeDOS Team World Wide Second major open-source distribution of DOS for PCs.
FreeDOS/32 Single FreeDOS Team World Wide Second major open-source distribution of DOS for PCs.
MS-DOS Single 1.25 - 8.0 Microsoft World Wide The primary version of DOS for PCs from 1986 - 2000
Multiuser DOS Multi 3.1, 5.0 DR, CCI, IMS World Wide
Novell DOS Single 7.0 World Wide Novell
OpenDOS Single 7.01, 7.02 beta Novell and Caldera World Wide Renamed to Caldera DR-DOS during beta phase of v7.02, but development has continued on v 7.01 by various people.
IBM PC-DOS Single 1.0 - 7.0, 2000 IBM World Wide the primary DOS used on IBM's PCs. PC-DOS and MS-DOS split after version 6.2
PTS-DOS Single Paragon Software Russia
86-DOS Single N/A World Wide This is the version that became PC-DOS and MS-DOS
Real/32 Multi 7.x IMS world wide This is the latest version of IMS Multiuser DOS.

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