ZWEI

ZWEI (ZWEI Was EINE, Initially; also German: two) was an early (~1980s) Emacs-like text editor written by Daniel Weinreb and Mike McMahon for the Lisp machine. It is the successor of the editor EINE (which is the feminine of a/one in German). Innovations by it include programmability in Lisp, and a new and more flexible method of internally representing buffers. It would later become Symbolics' editor of choice for its Lisp machine development environment, Zmacs. ZWEI is the editor library used for Zmacs (the editor), Zmail (the mail client) and Converse (a message client) in the Symbolics Genera operating system.

Further reading

• Weinreb, Daniel L., MIT S.B. Thesis on ZWEI editor
• Symbolics Genera 7.0 documentation, Book 3, Text Editing and Processing, July 1986
• MIT CADR Lisp Machine Source code

Emacs GNU Emacs and derivatives GNU Emacs XEmacs SXEmacs Aquamacs Other Emacs implementations Climacs Epsilon Freemacs EINE Gosling Emacs Mocklisp Hemlock JOVE mg MicroEMACS MINCE Multics Emacs GNU TeXmacs vile Zile Zmacs ZWEI Emacs modes AUCTeX Dired Dunnet Emacs Speaks Statistics Emacspeak ERC eww Gnus Org-mode Planner rcirc RefTeX SLIME Emacs/W3 w3m Emacs internals Emacs Lisp Apel Leim MULE Other Conkeror Dissociated press Editor war Emacs on Wikimedia Commons Emacs on Wikiquotes