Proper noun
Xenix
(computing, historical) A version of the Unix operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation in the late 1970s.
Any real mode operating system (such as 8086 Xenix ) could also be made to run using OS/2's virtual machine capabilities, subject to certain direct hardware access limitations. Source: Internet
The 68000 was used in Microsoft Xenix systems as well as an early NetWare Unix-based Server. Source: Internet
While waiting for this new high-end system to develop, Microsoft would still receive licensing money from Xenix and OS/2 sales. Source: Internet