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| | Emacs - Wikipedia, the free encyclopedia |
 | | Many versions of Emacs have appeared over the years, but nowadays there are two that are commonly used: GNU Emacs, started by Richard Stallman in 1984 and still maintained by him, and XEmacs, a fork of GNU Emacs which was started in 1991 and has remained mostly compatible. |
 | | GNU Emacs is written in C and provides Emacs Lisp (itself implemented in C) as an extension language. |
 | | The source code, including both the C and Emacs Lisp components, is freely available for examination, modification, and redistribution, under the terms of the GNU General Public License (GPL). |
| en.wikipedia.org /wiki/Emacs (3507 words) |
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