Zmacs is one of the many variants of the Emacs text editor.
Zmacs was written for the MIT Lisp machine and runs on its descendants (Symbolics Genera, LMI Lambda, TI Explorer).
It is based on the ZWEI programming substrate, which stands for "Zwei Was EINE Initially"; Zwei was a collection of routines which could be used to easily implement other programs, like the Symbolics mail program, Zmail.
A distinctive feature of Zmacs, which can also be found in Hemlock and LispWorks, is that commands look like M-x Compile Buffer instead of M-x compile-buffer as modern Emacsen, like GNU Emacs, generally format commands.
This text editor article is a stub.