operating system /U-S-G yoo'niks/ Refers to AT&T Unix commercial versions after Version 7, especially System III and System V releases 1, 2, and 3. So called because during most of the lifespan of those versions AT&T's support crew was called the "Unix Support Group".
Compare BSD.
(1997-02-20)
Try this search on Wikipedia, OneLook, Google
Nearby terms: user-obsequious « user-unctuous « Use the Source Luke « USG Unix » usim » USL » USP