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GNU Emacs is one of the two most popular versions of the Emacs text editor (see also XEmacs ). The GNU Emacs manual describes it as "the extensible, customizable, self-documenting, real-time display editor." Since so much of the user interface of GNU Emacs and XEmacs is the same, a combined introduction is available in Emacs . DISTRIBUTION GNU Emacs is Free Software , distributed under the terms of the GNU GPL . The source code and binaries are available via FTP from the GNU project website (see below). They are also widely available from other sites on the Internet . Vendors of Unix systems, both free and proprietary, frequently provide Emacs bundled with the Operating System . GNU Emacs runs on a large number of platforms, including GNU/Linux , FreeBSD , most other variants of Unix , Mac OS 8 / OS 9 , Mac OS X , and Microsoft Windows . DEVELOPMENT GNU Emacs is part of the GNU Project , and is under active development. Several, but not all, of the developers are affiliated with the Free Software Foundation (FSF). As Of 2004 , the latest release of GNU Emacs is version 21.4. Development takes place in a single CVS trunk, which is at version 22.0.50. The current maintainer is Richard Stallman . Until enforcement, so that the FSF can defend the software in a court case if one arises. This requirement by the GNU Emacs maintainers is assumed to affect contributions. Some people claim that it even affects performance, e.g. the inability of GNU Emacs to handle large files in an efficient manner could be blamed on the mentioned requirement repelling any serious developer. However, according to Stallman, it is more important for the program to be "free" than good in any other aspect. Enforcement provides legal confidence in the GNU Emacs Free Software License —the GNU General Public License —and in the free software itself—an intellectual work with many copyrights and contributors. REFERENCES
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