How Calculators Work There might have been an era when the most complicated calculations that people were required to make could be executed using their fingers or toes. However, nowadays, it's all but impossible for many people to imagine doing anything involving numbers -from math homework from tax forms to tipping servers in restaurants -- without the help of at least a basic pocket calculator. Indeed, electronic calculators are used so widely that it's hard to believe that they weren't widely used until the middle of the 20 th century. Before the advent and development of the contemporary calculator there were other devices for computation. The abaci , for example, is a precursor to the calculator. It is likely to be of Babylonian origin early abaci can be believed to be boards on which the position of counters was used to represent numerals. However, the current abacus -- that some people still use today in China, Japan and the Middle East -- works by moving b...
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