"Emacs is a class of text editors that have an extensive set of features and that are popular with computer programmers and other technically proficient computer users. GNU Emacs, a part of the GNU project, is under active development and is the most popular version. The GNU Emacs manual describes it as “the extensible, customizable, self-documenting, real-time display editor.” It is also the most portable and ported of the implementations of Emacs. As of March 2008, the latest stable release of GNU Emacs is version 22.2. Emacs should be included in most distro’s or easily installable from your distro’s repo’s..."