• 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 its direct descendant, GNU Emacs, actively continues. ← Wikipedia ↑ gnu.org/software/emacs

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