History of Calculator
History of computing
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Damian Gordon. Might be an early example of a Tally Stick. An ancient memory aid device to record and document numbers, quantities, or even messages.
By Anne Perera. The first man-made computing device is the “Abacus” The abacus, also called a counting frame. The Chinese abacus was developed about 5000.
How To Build a Computer
ROMANs by Pavan Plaha
History of The Computer and The Internet
