Adjective
multiuser (not comparable)
(computing, telecommunications) Of an operating system, etc., having capabilities for serving many users simultaneously.
Also, the multiuser OSs of today are often either inspired by, or directly descended from, minicomputer OSs. Source: Internet
On some multiuser BBSs (where more than one person could be online at once), there were games allowing users to interact with one another. Source: Internet
Real-time operating systems would also be used for time-sharing multiuser duties. Source: Internet
Windows also has full support for multiple input/mouse configurations for multiuser environments. Source: Internet