How Calculators Work There could have been times when the most complex calculations people needed to conduct could have been performed on their fingers and toes. Today it's nearly impossible for a lot of people to imagine performing any task that involves numbers- from math homework and tax return filings to tipping server at restaurants without at least a basic pocket calculator. In fact, electronic calculators are so ubiquitous that it's hard to believe they didn't become widespread until the latter half of the 20 century. century. Before the invention in the present-day calculator the people were using different tools for computing. The abacus , for example, is a precursor to the calculator. It is likely to be originally of Babylonian origin The earliest abaci were believed to be boards on which the location of counters stood for the numerical value. But the present abacus -- which is still used by some throughout China, Japan and the Middle East -- works by mov...
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