/goz'maks/ Gosling Emacs. The first Emacs implementation in C, predating but now largely eclipsed by GNU Emacs. Originally freeware; a commercial version is now modestly popular as UniPress Emacs. The author (James Gosling) went on to invent NeWS.
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Nearby terms: gorp « GOSIP « Gosling, James « GOSMACS » Gosperism » GOSPL » gotcha