The CMOS version of the 65C02. Used on long selling 3rd version Apple //e, Appple //c and lots of single-board industrial control computers. One of the most commercially important CPU architectures in the development of the personal computer. Patents cited on die: more details and photos on my blog: Apple ][ Photograph by Rama, Wikimedia Commons, Commodore Pet 2001 Photograph by Rama, Wikimedia Commons,