Version 7

Seventh Edition Unix, also called Version 7 Unix, Version 7 or just V7, was an important early release of the Unix operating system. V7, released in 1979, was the last Bell Laboratories release to see widespread distribution before the commercialization of Unix by AT&T in the early 1980s. V7 ran, amongst others, on Digital Equipment Corporation's PDP-11 minicomputers and on the Interdata 8/32.
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<operating system> (V7) The unsupported release of Unix ancestral to all current commercial versions. Brian Kernighan announced the release of V7 in summer 1979, at the Unix User's Group meeting in Toronto.
Before the release of the POSIX/SVID standards, V7's features were often treated as a Unix portability baseline. Some old-timers impatient with commercialisation and kernel bloat still maintain that V7 was the Last True Unix.
See BSD, USG Unix, System V.
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(1996-05-22)