Someone has scanned in all the pages of the 1971 and 1979 editions of the Ladybird book How It Works…The Computer. This is wonderful stuff. I remember using the 1971 edition to explain to relatives (elderly, young, and just plain confused) what it was that I did for a living; I also bought the 1979 edition for my son, Chris, who was five at the time (and a voracious reader). Both pictures and text are priceless.
(Via Boing-Boing.)