If you need a simple introduction to the hardware side of logic then Bebop to the Boolean Boogie: An Unconventional Guide to Electronics by Clive Maxfield is an easy read. If you like "For Dummies" then Logic For Dummies by Mark Zegarelli is worth a look but notice that it goes well beyond the logic needed for computing and into phillosophical logic. For a more serious introduction, but it is dry and mathematical, try: Boolean Algebra and Its Applications by J. Eldon Whitesitt.Great Finally, even though it is out of print, Ideas in Information Theory, Language and Cybernetics by Jagjit Singh is essential reading for many of the topics in Babbage's Bag.

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