Two versions of XEmacs for the Microsoft Windows environment exist: a native installer and a Cygwin package. Running on Mac OS requires X11 while development has started on a native Carbon version. XEmacs runs on many operating systems including Unix/ Linux, BSDs and Mac OS X. XEmacs supports many human languages as well as editing-modes for many programming and markup-languages. XEmacs has comprehensive online help, as well as five manuals available from the XEmacs website. XEmacs has commands to manipulate words and paragraphs (deleting them, moving them, moving through them, and so forth), syntax highlighting for making source code easier to read, and "keyboard macros" for performing arbitrary batches of editing commands defined by the user.
The software community generally refers to GNU Emacs, XEmacs (and a number of other similar editors) collectively or individually as emacsen (by analogy with oxen) or as emacs, since they both take their inspiration from the original TECO Emacs. For a period of time XEmacs even had some terminal-specific features, such as coloring, that GNU Emacs lacked. Installers can compile both XEmacs and GNU Emacs with and without X support. After initially only supporting X11, XEmacs supported text-based terminals and windowing systems other than X11. The "X" in XEmacs is thus not related to the X Window System. Accordingly, the "X" in XEmacs represents a compromise among the parties involved in developing XEmacs. Ĭompanies such as Sun Microsystems wanted to carry on shipping Lucid Emacs, but using the trademark had become legally ambiguous because no one knew who would eventually control the trademark "Lucid". When Lucid went out of business in 1994, other developers picked up the code. Lucid continued developing and maintaining their version of Emacs, while the FSF released version 19 of GNU Emacs a year later, while merging some of the code and adapting some other parts. However, they did not have time to wait for their changes to be accepted by the Free Software Foundation (FSF). With the intention that their new version, released in 1991, would form the basis of GNU Emacs version 19. So Lucid recruited a team to improve and extend the code, faced a requirement to ship Emacs to support the Energize C++ IDE. Between 19 significant delays occurred in bringing out a new version of GNU Emacs (presumed to be version 19).
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