Berkeley Software Distribution (BSD, sometimes called Berkeley Unix) is the
UNIX derivative distributed by the
University of California, Berkeley, starting in the
1970s. Historically, BSD has been considered as a branch of UNIX — 'BSD UNIX', because it had shared the initial codebase and design with the original UNIX by AT&T and collaborated on the development in the pioneer days of UNIX. It was widely identified with the versions of UNIX available for
workstation-class systems, that can be attributed to the ease with which it could be licensed and the familiarity it found among the founders of many technology companies during the
1980s. The familiarity often came from using similar systems — notably
DEC's
ULTRIX and
Sun Microsystems SunOS — during their education. Though BSD itself was largely superseded by the
System V Release 4 and
OSF/1 systems in the
1990s (both of which incorporated BSD code), the modified codebase as
open source — mostly derived from 4.4BSD-Lite have seen increasing use and development recently.
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<
operating system> (BSD) A family of
Unix versions for the
DEC VAX and
PDP-11, developed by
Bill Joy and others at the
University of California at Berkeley. BSD Unix incorporates
paged virtual memory,
TCP/IP networking enhancements, and many other features.
BSD UNIX 4.0 was released on 19 October 1980. The BSD versions (4.1, 4.2, and 4.3) and the commercial versions derived from them (
SunOS,
ULTRIX,
Mt. Xinu,
Dynix) held the technical lead in the Unix world until
AT&T's successful standardisation efforts after about 1986, and are still widely popular.
See also
Berzerkeley,
USG Unix.
(1994-11-23)
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