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

In the 20th century, with the advancement of electronics and digital technology, calculators evolved into their modern form. The first electronic calculator was developed by Clive Sinclair in 1960, known as the "Sinclair Executive." 3/4