Designed the Apple I and Apple ][ (or is that Apple //?), and IIRC
wrote everything in the ROM *except* for Applesoft (a/k/a Microsoft)
Basic; that included an interpreter for a 16-bit instruction set of
his own invention called "SWEET-16".
His last really major technical contribution to the company, by all
accounts, was the Apple II (err.. ][, err.. //) disk controller; he
isn't generally credited with much technical contribution at all to
subsequent development work (Lisa, Macintosh), but I do know he shows
up in the movie, hence, my confusion...