For Love or Money: the Graphing Calculator story

Ron Avitzur of Pacific Tech has posted the story of how PT’s Graphing Calculator application came to be part of the Mac standard software distribution. The idea of an inventor so seized by an idea that he realizes through sheer force of will is a fairly common one, but this is the first time that I’ve heard of someone sneaking into the company that let him go to make it happen.
Vectored from comp.risks, though Slashdot evidently covered the story last week.