Xenix

Xenix
Xenix under Bochs
DeveloperMicrosoft, SCO, HCR, Logica
OS familyUnix (SysV)
Working stateHistoric
Source modelClosed source
Initial release1980 (1980)
Latest releaseSystem V Release 2.3.4 / 1991 (1991)
PlatformsPC/XT, x86, PDP-11, Z8001, 68k
Kernel typeMonolithic kernel
Default
user interface
Command-line interface
LicenseProprietary
Succeeded bySCO UNIX, OS/2

Xenix is a discontinued Unix operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation. The first version was released in 1980, and Xenix was the most common Unix variant during the mid- to late-1980s. The Santa Cruz Operation (SCO) acquired exclusive rights to the software, and eventually replaced it with SCO UNIX, later known as OpenServer, with the final Xenix version released in 1991.


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