EINE

EINE was a screen editor text editor for the MIT LISP machines. Its name is a recursive acronym, 'EINE is not EMACS', as announced by Daniel Weinreb on August 8th 1977.

EINE adopted the EMACS user interface going back to early 1977 when it was just called the 'Lisp machine editor'. Its entry point '(ED)' can be found as early as 1975, but at that point the user interface had not been implemented.

Weinreb re-implemented the text editor as ZWEI ('ZWEI was EINE initially' - the two names are German for 'one' and 'two') with help from Mike McMahon. Future iterations were renamed Zmacs.