FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Pascaline, also called Arithmetic Machine, the first calculator or adding machine to be produced in any quantity and actually used. The Pascaline was designed and built by the French mathematician-philosopher Blaise Pascal between 1642 and 1644.

Detailed explanation-2: -Blaise Pascal invented a mechanical calculator with a sophisticated carry mechanism in 1642. After three years of effort and 50 prototypes he introduced his calculator to the public.

Detailed explanation-3: -Pascal invented the first digital calculator to help his father with his work collecting taxes. He worked on it for three years between 1642 and 1645. The device, called the Pascaline, resembled a mechanical calculator of the 1940s.

Detailed explanation-4: -– A digital mechanical calculator [was] invented by the German mathematician Gottfried Wilhelm Leibniz. It was the first calculator that could perform all four arithmetic operations.