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