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)