Devices have been used to aid computation for thousands of years, mostly using onetoone correspondence with fingers . The earliest counting device was probably a form of tally stick . Later record keeping aids throughout the Fertile Crescent included calculi (clay spheres, cones, etc.) which represented counts of items, probably livestock or grains, sealed in hollow [4] [5] unbaked clay containers. The use of counting rods is one example. Suanpan (the number represented on this abacus is 6…
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