In 1640s, the first mechanical calculator was manufactured for commercial purposes. Blaise Pascal invented the first commercial calculator, which was a hand-powered adding machine. In 1670s, Gottfried Liebnitz made attempts to invent a calculator that multiplied mechanically, but the first multiplying calculator appeared in Germ...
The word "computer" was originally the name of a profession before the 20th century. "Computers" were people performing mathematical calculations by hand and paper for architects a...
