An article by Wozniak back in 1977 talking about the Apple system in Byte magazine. I thought it was really cool...
http://hardware.slashdot.org/story/12/05/18/2020219/wozniaks-original-system-description-of-the-apple- (http://hardware.slashdot.org/story/12/05/18/2020219/wozniaks-original-system-description-of-the-apple-)