original_query: What is Multiuser DOS?
query: What is Multiuser DOS?
answer: Multiuser DOS (MDOS) is a real-time multi-user multitasking operating system for IBM PC-compatible microcomputers.  It evolved from earlier Digital Research operating systems and was later acquired by Novell.  It had limitations compared to LANs based on PC DOS, such as requiring special device drivers and lacking flexibility with newer hardware.