How Calculators Work There might have been some time when the most complicated computations people had to complete could be executed using their fingers or toes. However, today it's almost impossible for most people to imagine doing anything involving numbers -from math homework to tax returns to tipping servers at restaurants -- with out the aid of at least a basic pocket calculator. Actually, electronic calculators are so widespread now that it's hard to believe they didn't become widespread until the latter half of the 20 century. century. Before the advent and development of the contemporary calculator there were other tools for computation. The abacus for instance, is one of the predecessors of the calculator. Perhaps it is of Babylonian origin the earliest abaci were believed to be boards that had the position of counters stood for the numerical value. But the current abacus -- that are still in use in China, Japan and the Middle East -- works by transferrin...
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