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(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.


A text editor that is widely used for writing GNU/Linux software. It was written by Richard Stallman and released in 1984 as the first "free software" program of the GNU Project. It is an advanced text editor supporting multiple windows that is available for several platforms.

A Collection of Macros
The name comes from the first version of Emacs that Stallman created at MIT in the mid-1970s, called "Editing Macros," which was a set of macros added to the TECO text editor. Numerous versions of Emacs were subsequently created by several people, and the GNU Emacs version is maintained by the Free Software Foundation. For more information, visit www.gnu.org/software/emacs. See GNU Project, GNU/Linux, free software, Free Software Foundation and TECO.
References in periodicals archive ?
Emacs Menus analyzes the surrounding code and displays only the choices that make sense for the current context.
The Emacs Menus database also stores the kind of parameter, whether optional, keyword, or "&rest" (meaning any number of arguments can be passed).
Emacs Menus' inside-out parser figures out its corresponding function and parameter, looks it up in the Emacs Menus Common Lisp database, and constructs, on the fly, a submenu containing items for information purposes only.
For lexical variables and some other constructs, Emacs Menus can't infer the type.
The Information menu in Emacs Menus helps catch such errors as "wrong number of arguments to a function" or "wrong type of an argument" before compiling or runtime but after they've been entered.
The central insight behind Image EMACS is that many text editing operations can be implemented directly in terms of geometrical operations on connected components, without explicit knowledge of the symbolic character labels, that is, without character recognition.
Image EMACS constructs a similar data structure from an image of text by first segmenting the image into a sequence of lines and then performing connected component analysis on each line.
Image EMACS handles multipart characters with simple connected component grouping rules based on similarity of horizontal position of component bounding boxes.
Table 1 identifies a small subset of the Image EMACS linear text editing commands.