The invention and development of the calculator have a rich history with contributions from several notable figures. One of the most important individuals in the history of mechanical calculators is Blaise Pascal. In 1642, he invented a mechanical calculator called the "Pascaline," which could perform addition... 1/4

and subtraction. This device is recognized as one of the first mechanical calculators.

Another key figure is Gottfried Wilhelm Leibniz, who in the late 17th century developed a mechanical calculator capable of performing multiplication and division. His device is known as the "Leibniz Wheel." 2/4