bsd/os

from The Free On-line Dictionary of Computing (8 July 2008)

BSD/OS

   <operating system> {BSDI}'s commercial version of {Berkeley
   Standard Distribution} {Unix}.  BSD/OS is a
   {POSIX}-compatible, {Unix}-like system for the {80386}, {486},
   and {Pentium}.  It is based on the {BSD} software from {UCB},
   a number of other sources, and components engineered by BSDI.
   The initial production release of BSD/OS shipped in March,
   1993.

   (1996-01-13)