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He was impressed by the editor's intuitive WYSIWYG (What You See Is What You Get) behavior, which has since become the default behavior of most modern text editors. Richard Stallman visited the Stanford AI Lab in 1976 and saw the lab's E editor, written by Fred Wright. (A similar technique was used to allow overtyping.) This behavior is similar to that of the program ed. One could not place characters directly into a document by typing them into TECO, but would instead enter a character ('i') in the TECO command language telling it to switch to input mode, enter the required characters, during which time the edited text was not displayed on the screen, and finally enter a character () to switch the editor back to command mode. Unlike most modern text editors, TECO used separate modes in which the user would either add text, edit existing text, or display the document. Įmacs development began during the 1970s at the MIT AI Lab, whose PDP-6 and PDP-10 computers used the Incompatible Timesharing System (ITS) operating system that featured a default line editor known as Tape Editor and Corrector (TECO). Įmacs' interface was influenced by the design of the space-cadet keyboard, which sought to enable users to type as many different kinds of input as possible.

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Emacs is among the oldest free and open source projects still under development. XEmacs development is inactive.Įmacs is, along with vi, one of the two main contenders in the traditional editor wars of Unix culture.

GNU Emacs and XEmacs use similar Lisp dialects and are, for the most part, compatible with each other. XEmacs is a variant that branched from GNU Emacs in 1991. The most popular, and most ported, version of Emacs is GNU Emacs, which was created by Richard Stallman for the GNU Project. It was inspired by the ideas of the TECO-macro editors TECMAC and TMACS. as a set of Editor MACroS for the TECO editor. The original EMACS was written in 1976 by David A. Extensions have been written to, among other things, manage files, remote access, e-mail, outlines, multimedia, git integration, and RSS feeds, as well as implementations of ELIZA, Pong, Conway's Life, Snake, Dunnet, and Tetris. Implementations of Emacs typically feature a dialect of the Lisp programming language, allowing users and developers to write new commands and applications for the editor.

Įmacs has over 10,000 built-in commands and its user interface allows the user to combine these commands into macros to automate work. Development of the first Emacs began in the mid-1970s, and work on its direct descendant, GNU Emacs, continues actively as of 2022.

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The manual for the most widely used variant, GNU Emacs, describes it as 'the extensible, customizable, self-documenting, real-time display editor'.

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Various free/libre software developers, including volunteers and commercial developersĮmacs / ˈ iː m æ k s/, originally named EMACS (an acronym for 'Editor MACroS'), is a family of text editors that are characterized by their extensibility. Org-mode, Magit, and Dired buffers in GNU Emacs

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