Daniel L. Murphy invented [[TECO]], Emacs's mother.

TECO introduced the spirit and approach behind Emacs. Emacs was not simply "''implemented'' in TECO", as you sometimes hear.

What did ''Emacs'' add then?

* The idea that ''everything'' is a [[command]], including self-inserting characters. That is, every [[key]] is bound to an "editor macro".
* And (later) Lisp.

'''Dan:'''

* Home page: http://opost.com/dlm/
* Blog: http://www.opost.com/dlm/blog/
* Bio: http://www.linkedin.com/pub/dan-murphy/6/183/428
* Dan also helped create the [[http://tenex.opost.com/hbook.html|TWENEX/TOPS-20]] OS

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