Jef Raskin on history of PARC and the Macintosh (mxmora.best.vwh.net)

Particularly interesting for me was the bit on his 1967 thesis

"A Hardware-Independent Computer Drawing System Using List-Structured Modeling: The Quick-Draw Graphics System" (Pennsylvania State University, 1967).

Also interesting are Bruce Horn's letters:

http://mxmora.best.vwh.net/brucehorn.html