Gosling Emacs (often shortened to "Gosmacs" or "gmacs") is a discontinued
Emacs implementation written in 1981 by
James Gosling in
C. Its extension language,
Mocklisp, has a syntax that appears similar to
Lisp, but Mocklisp does not have lists or any other structured datatypes. Gosling initially allowed Gosling Emacs to be redistributed with no formal restrictions, but later sold it to
UniPress.