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EINE and ZWEI
EINE and ZWEI were two Emacs-like text editors developed by Daniel Weinreb and Mike McMahon for Lisp machines in the 1970s and 80s.
==History==
EINE was a text editor developed in the late 1970s. In terms of features, its goal was to "do what Stallman's PDP-10 (original) Emacs does".〔(【引用サイトリンク】title=Comment by ZWEI's author Dan Weinreb )〕 It was the first of what would become many Emacs-like text editors (each of which is also called an Emacs, so EINE can be called the second Emacs ever written). EINE's main difference was that, while Richard Stallman's original Emacs was written in TECO, EINE was the first Emacs to be written in Lisp. It used Lisp Machine Lisp. Stallman later wrote GNU Emacs, which was written in C and Emacs Lisp and extensible in Emacs Lisp. EINE also made use of the window system of the Lisp machine and was the first Emacs to have a graphical user interface.
In the 1980s, EINE was developed into ZWEI. Innovations included programmability in Lisp Machine Lisp, and a new and more flexible doubly linked list method of internally representing buffers.
ZWEI would eventually become the editor library used for Symbolics' Zmacs (Emacs-like editor), Zmail (mail client), and Converse (message client), which were integrated into the Genera operating system which Symbolics developed for their Lisp machines.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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