 Novell DR Multiuser DOS Release 5.1 | |
| Developer | Digital Research, Novell |
|---|---|
| OS family | CP/M |
| Working state | Discontinued |
| Source model | Closed source |
| Final release | 7.22 R18 / 21 April 2005 (REAL/32: 7.95) |
| Available in | English |
| Update method | Re-installation |
| Package manager | None |
| Platforms | x86, 68000 |
| Kernel type | Monolithic kernel |
| Default user interface | Command-line interface (COMMAND.COM) |
| License | Proprietary |
| Official website | Various (see notes) |
Multiuser DOS is a real-time multi-user multi-tasking operating system for IBM PC-compatible microcomputers.
An evolution of the older Concurrent CP/M-86, Concurrent DOS and Concurrent DOS 386 operating systems, it was originally developed by Digital Research and acquired and further developed by Novell in 1991.[1][2][3] Its ancestry lies in the earlier Digital Research 8-bit operating systems CP/M and MP/M, and the 16-bit single-tasking CP/M-86 which evolved from CP/M.
When Novell abandoned Multiuser DOS in 1992, the three master value-added resellers (VARs) DataPac Australasia, Concurrent Controls[4] and Intelligent Micro Software[5] were allowed to take over and continued independent development into Datapac Multiuser DOS and System Manager, CCI Multiuser DOS, and IMS Multiuser DOS and REAL/32.[5]
The FlexOS line, which evolved from Concurrent DOS 286 and Concurrent DOS 68K, was sold off to Integrated Systems, Inc. (ISI) in July 1994.
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