[lispm]

A Lisp Machine is a real computer which runs Lisp on the metal. One of the applications of a Lisp Machine is one or more editors written in Lisp.

GNU Emacs is an editor written and extended in a dumbed down dialect of Lisp, on top of a dumbed down Lisp runtime, on top of some kind of other operating system. It provides a relatively poor user interface (especially compared to the real Lisp Machines which existed).

[aaronem]

I never had the privilege of using a real Lisp Machine, so the difference isn't obvious to me. Thanks for the correction.