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BSD: /B·S·D/, n. [abbreviation for ‘Berkeley Software Distribution’] a
family of Unix versions for the
DEC VAX and
PDP-11 developed by Bill Joy and others at
Berzerkeley starting around 1977, incorporating
paged virtual memory, TCP/IP networking enhancements, and many other
features. The BSD versions (4.1, 4.2, and 4.3) and the commercial versions
derived from them (SunOS, ULTRIX, and Mt. Xinu) held the technical lead in
the Unix world until AT&T's successful standardization efforts after
about 1986; descendants including Free/Open/NetBSD, BSD/OS and MacOS X are
still widely popular. Note that BSD versions going back to 2.9 are often
referred to by their version numbers alone, without the BSD prefix. See
also Unix.
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