Early editor written in TECO
Author: Vaughan Pratt Homepage: http://boole.stanford.edu/pratt.html Manual: http://boole.stanford.edu/zed.txt Source: http://sites.google.com/site/texteditors/Home/files/zed.tec (TECO) http://sites.google.com/site/texteditors/Home/files/zed.ml (Mock-Lisp) History: http://newsgroups.derkeiler.com/Archive/Comp/comp.emacs/2007-08/msg00082.html Family: EarlyEditorFamily Platform: TECO License: Open source
ZED was originally implemented in ITS TECO, and was considered an ancestor of Unix ex. It was originally called DOC, and later renamed to ZED. It used ITS TECO's Control-R mode, which permitted interactive usage. It was originally written to provide a more a more meaningful interface for a secretary who would be using TECO, based on work Professor Pratt was doing in natural language processing.
In the early 1980's Professor Pratt rewrote ZED in Mock-Lisp for Gosling Emacs, as ITS TECO and its associate Control-R mode was going away.