Orignally released by Digital Research, Multiuser DOS was a multiple user operting system for the PC. It eventually was released by two other companies, Concurrent Controls Inc and Intelligent Micro Systems. The split hapeened after v 5.01 was relerased. .
- DR Mutliuser DOS 5.0 released by Digital Research in late 1990
- DR Multiuser DOS 5.01 released by Digital Research in early 1991
- CCI Multiuser DOS developed CCI
- DR Multiuser DOS 5.1 was developed by Digital Research and released in April, 1992
- CCI Concurrent DOS 3.0 developed by CCI.
- Multiuser DOS GOLD developed CCI
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|MS-DOS compatible operating systems|
|Single User||MS-DOS * IBM PC-DOS * DR-DOS * PTS-DOS * 86-DOS * FreeDOS * FreeDOS-32|
OpenDOS * DOS Plus
|Multiuser||MultiUser DOS * PC-MOS * Real/32|