Emacs, originally named EMACS, is a family of text editors that are characterized by their extensibility. The manual for the most widely used variant, GNU Emacs, describes it as "the extensible, customizable, self-documenting, real-time display editor". Development of the first Emacs began in the mid-1970s, and work on GNU Emacs, directly descended from the original, is ongoing; its latest version is 29.3, released March 2024.
Emacs was started by Guy L. Steele Jr. as a project to unify the many divergent TECO command sets and key bindings at MIT
Emacs' 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.
James Gosling wrote an Emacs-like editor to run on Unix (Gosling Emacs) in 1981
A text editor is a type of computer program that edits plain text. Such programs are sometimes known as "notepad" software. Text editors are provided with operating systems and software development packages, and can be used to change files such as configuration files, documentation files and programming language source code.
A box of punched cards with several program decks.