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With the economies and technologies growing at a rapid pace, the need had been felt wide and across to have gadgets that could perform all basic functions automatically and quickly. This lead to emergence of basic calculators that were capable of performing minor calculations like 'plus', 'minus', 'multiplication' and 'division'. Programmable calculators were later invented to make complicated calculations. The scientific calculators that we see today are latest inventions that came about in these segments. There are now widely used in companies and universities for calculation processes. With the advent of internet, these calculators have further been modified to be made available in online version.

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