Multiuser DOS

Multiuser DOS is a <a href="/facts/Real-time_operating_system/IvUCFwCL">real-time</a> multi-user multi-tasking <a href="/facts/Operating_system/8XTuvMh2">operating system</a> for <a href="/facts/IBM_Personal_Computer/yhcJGMPL">IBM PC</a>-compatible microcomputers.
An evolution of the older Concurrent CP/M-86, Concurrent DOS and Concurrent DOS 386 operating systems, it was originally developed by <a href="/facts/Digital_Research/9bYQl2pI">Digital Research</a> and acquired and further developed by <a href="/facts/Novell/lABGMT7U">Novell</a> in 1991. Its ancestry lies in the earlier Digital Research <a href="/facts/8-bit/2CkhLNoH">8-bit</a> operating systems <a href="/facts/CP%2fM/n5rTgXdC">CP/M</a> and <a href="/facts/MP%2fM/slxQMszr">MP/M</a>, and the <a href="/facts/16-bit/bTGS44Ne">16-bit</a> single-tasking <a href="/facts/CP%2fM-86/x6BzDadH">CP/M-86</a> which evolved from CP/M.
When Novell abandoned Multiuser DOS in 1992, the three master <a href="/facts/Value-added_reseller/pxI6fsPs">value-added resellers</a> (VARs) DataPac Australasia, <a href="/facts/Concurrent_Controls/2Hh4WH3m">Concurrent Controls</a> and <a href="/facts/Intelligent_Micro_Software/2Hh4WH3m">Intelligent Micro Software</a> 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.
The <a href="/facts/FlexOS/563z8WWo">FlexOS</a> line, which evolved from <a href="/facts/Concurrent_DOS_286/2Hh4WH3m">Concurrent DOS 286</a> and <a href="/facts/Concurrent_DOS_68K/2Hh4WH3m">Concurrent DOS 68K</a>, was sold off to <a href="/facts/Integrated_Systems_Inc./MCX2b8KC">Integrated Systems</a>, Inc. (ISI) in July 1994.

Multiuser DOS open-in-new

Multiuser DOS