(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/SVIDstandards, 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. [Jargon File] (1996-05-22)