Z:gnu-www-ja-2001-10-22-Emacs--709828-Richard Stallman developed the/en

Richard Stallman developed the original Emacs text editor in 1975 while working at MIT. Emacs, first developed in 1975, is an extensible text editor that allows the user to program editing commands. The original Emacs used TECO as the user programming language. GNU Emacs, which uses Lisp as the user programming language, was started in September 1984 as part of developing the GNU operating system.