<language> A dialect of Lisp used to implement the higher layers of the Free Software Foundation's editor, GNU Emacs. Sometimes abbreviated to "elisp". An enormous number of Emacs Lisp packages have been written including modes for editing many programming languages and interfaces to many Unix programs.

1. <language> A Lisp variant originally implemented for DEC-20s by Chuck Hedrick of Rutgers. 2. <language> A common abbreviation for Emacs Lisp. Use of this abbreviation is discouraged because "Elisp" is or was a trademark. [Still a trademark? Whose?] (1995-04-04)

/gnoo'maks/ [contraction of "GNU Emacs"] Often-heard abbreviated name for the GNU project's flagship tool, Emacs. Used especially in contrast with GOSMACS. [Jargon File]

Emacs

Editing MACroS (Reference: GNU)

<text, tool> /ee'maks/ (Editing MACroS, or Extensible MACro System, GNU Emacs) A popular screen editor for Unix and most other operating systems. Emacs is distributed by the Free Software Foundation and was Richard Stallman's first step in the GNU project. Emacs is extensible - it is easy to add new functions; customisable - you can rebind keys, and modify the behaviour of existing functions; self-documenting - there is extensive on-line, context-sensitive help; and has a real-time "what you see is what you get" display. Emacs is writen in C and the higher levels are programmed in Emacs Lisp. Emacs has an entire Lisp system inside it. It was originally written in TECO under ITS at the MIT {AI lab}. AI Memo 554 described it as "an advanced, self-documenting, customisable, extensible real-time display editor". It includes facilities to view directories, run compilation subprocesses and send and receive electronic mail and Usenet news (GNUS). W3 is a web browser, the ange-ftp package provides transparent access to files on remote FTP servers. Calc is a calculator and {symbolic mathematics} package. There are "modes" provided to assist in editing most well-known programming languages. Most of these extra functions are configured to load automatically on first use, reducing start-up time and memory consumption. Many hackers (including Denis Howe) spend more than 80% of their tube time inside Emacs. GNU Emacs is available for Unix, VMS, GNU/Linux, FreeBSD, NetBSD, OpenBSD, MS Windows, MS-DOS, and other systems. Emacs has been re-implemented more than 30 times. Other variants include GOSMACS, CCA Emacs, UniPress Emacs, Montgomery Emacs, and XEmacs. Jove, epsilon, and MicroEmacs are limited look-alikes. Some Emacs versions running under window managers iconify as an overflowing kitchen sink, perhaps to suggest the one feature the editor does not (yet) include. Indeed, some hackers find Emacs too heavyweight and baroque for their taste, and expand the name as "Escape Meta Alt Control Shift" to spoof its heavy reliance on keystrokes decorated with bucky bits. Other spoof expansions include "Eight Megabytes And Constantly Swapping", "Eventually "malloc()'s All Computer Storage", and "Emacs Makes A Computer Slow" (see {recursive acronym}). See also vi. Latest version: 20.6, as of 2000-05-11. 21.1 (RSN) adds a new redisplay engine with support for proportional text, images, toolbars, tool tips, toolkit scroll bars, and a mouse-sensitive mode line. FTP from your nearest GNU archive site. E-mail: (bug reports only) <bug-gnu-emacs@gnu.org>. Usenet newsgroups: news:gnu.emacs.help, news:gnu.emacs.bug, news:alt.religion.emacs, news:gnu.emacs.sources, news:gnu.emacs.announce. [Jargon File] (1997-02-04)

The second version of Lisp, successor to LISP 1. Developed at MIT in 1959. Followed by LISP 1.75, LISP 1.9, Lisp 2 and many other versions.

BBN LISP (also stylized BBN-Lisp) was a dialect of the Lisp programming language by Bolt, Beranek and Newman Inc. in Cambridge, Massachusetts.

<text, tool> (Originally "Lucid Emacs") A text editor for the X Window System, based on GNU Emacs version 19, produced by a collaboration of Lucid, Inc., SunPro (a division of Sun Microsystems, Inc.), and the University of Illinois. Lucid chose to build part of Energize, their C/C++ development environment on top of GNU Emacs. Though their product is commercial, the work on GNU Emacs is {free software}, and is useful without having to purchase the product. They needed a version of Emacs with mouse-sensitive regions, multiple fonts, the ability to mark sections of a buffer as read-only, the ability to detect which parts of a buffer has been modified, and many other features. The existing version of Epoch was not sufficient; it did not allow arbitrary pixmaps and icons in buffers, "undo" did not restore changes to regions, regions did not overlap and merge their attributes. Lucid spent some time in 1990 working on Epoch but later decided that their efforts would be better spent improving Emacs 19 instead. Lucid did not have time to get their changes accepted by the FSF so they released Lucid Emacs as a forked branch of Emacs. Roughly a year after Lucid Emacs 19.0 was released, a beta version of the FSF branch of Emacs 19 was released. Lucid continued to develop and support Lucid Emacs, merging in bug fixes and new features from the FSF branch as appropriate. A compatibility package was planned to allow Epoch 4 code to run in Lemacs with little or no change. (As of 19.8, Lucid Emacs ran a descendant of the Epoch redisplay engine.) [Update?] (2000-05-16)

Lots of Isolated Silly Parentheses (Reference: LISP, slang)