[lispm]

Genera was Symbolics' marketing name for their proprietary fork of the Lisp Machine OS.

TECO was THE editor for years - on PDPs. Its macros look like line noise (if you know what I mean). Emacs was 'invented' as a bunch of Editor MACroS for TECO. Now comes a new generation of machines (personal workstations). Kent was young and tried to show them that with software written TECO could do stuff like Zmacs (the first Emacs written in Lisp) or Zmail (a Zmacs-based mail-reader). TECO died anyway. The Emacs for Multics was also written in Lisp and got popular among Multics users.

TECO was available for everyone who had access to a terminal that had some connection to a PDP (or similar). The Lisp Machine OS had this $100000 hardware dongle - the Lisp Machine.