Scientific Calculator
How Calculators Work There was an era when the most complex calculations people required to perform could have been done with their fingers and toes. However, nowadays it's nearly impossible for a lot of people to imagine performing any task that involves numberssuch as math homework and tax return filings to tipping server at restaurants -- without at the very least a pocket calculator. Electronic calculators are now so commonplace that it's difficult to believe that they weren't widespread until the latter half of the 20 century. century. Before the advent of the current calculator the people were using other instruments for computation. The abaci is an example. It is one of the ancestors of the calculator. It is likely to be from Babylonian origin Early abaci were believed to be boards where the positions of counters was used to represent numbers. But the contemporary abacus -- that is still used by some throughout China, Japan and the Middle East -- works by m...