Portrait GNU Emacs is a text editor for Über-Geeks. GNU Emacs is the extensible, customizable, SelfDocumenting real-time display editor.

GNU stands for “GNU’s Not Unix,” and it represents the work of the FreeSoftwareFoundation (FSF) and its founder RichardStallman. Part of the project to create a Unix that was FreeSoftware included a highly functional editor as well as some sort of Lisp system. While I don’t think that RMS had planned for Emacs to become the Lisp support for the GNU system, in fact it has pretty much been the only Lisp to be found in the implementation of the operating system known as GNU/Linux.

See EmacsHistory for its history.

The latest release of GNU Emacs is 24.4 (announced Oct. 20, 2014). Details are here. The GNU Emacs software is subject to version 3 of the GnuGeneralPublicLicense.

FSF Emacs or GNU Emacs?

   M-x version RET


   GNU Emacs 24.3.1 (i686-apple-darwin, NS apple-appkit-1038.36) of 2013-03-13 on

So now you know.

Emacs vs XEmacs
EmacsSchism has a summary of what went down those days.
EmacsLisp or Scheme
See GuileEmacs.

Also see: CategoryBuilding

CategoryHistory EmacsImplementations