
LAN Manager was a Network Operating System (NOS) available from multiple vendors and developed by Microsoft in cooperation with 3Com Corporation. It was designed to succeed 3Com`s 3+Share network server software which ran atop a heavily modified version of MS-DOS. ==History== LAN Manager was based on the OS/2 operating system co-developed by IBM ....
Found on
http://en.wikipedia.org/wiki/LAN_Manager

A LAN OS rumoured to be used by some companies, perhaps in foreign countries.
Found on
http://www.encyclo.co.uk/local/20091

Distributed NOS, developed by Microsoft, that supports a variety of protocols and platforms.
Found on
https://www.encyclo.co.uk/local/22803
No exact match found.