Gosling Emacs
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Gosling Emacs was an Emacs implementation written in 1981 by James Gosling in C; it was the first Emacs implemention to run under Unix. It used "mocklisp" as its extension language, whose syntax appeared similar to Lisp, but which had no lists or other structured datatypes. Gosling initially allowed Gosling Emacs to be freely redistributed, but later sold it to UniPress. Since Gosling had permitted its free redistribution, Richard Stallman used some Gosling Emacs code in the initial version of GNU Emacs. However, since UniPress was now selling Gosling Emacs (which it renamed Unipress Emacs) as a commercial product, it forced Stallman to stop distributing Gosling Emacs source code. Thus all Gosling Emacs code was removed from GNU Emacs in version 16.56.
