High Quality Content by WIKIPEDIA articles! The Pascaline, invented by Blaise Pascal in France in 1642, was a mechanical calculator that could add and subtract directly. Its introduction in 1645 launched the development of mechanical calculators, first in Europe and then all over the world, development which culminated three centuries later by the invention of the first microprocessor developed for a Busicom calculator in 1971.The mechanical calculator industry owes a lot of its key machines and inventions to the pascaline. First Gottfried Leibniz created his famous Leibniz wheels around 1673 while trying to add an automatic multiplication and division feature to the pascaline.

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