Empire of the Sum: The Rise and Reign of the Pocket Calculator

The hidden history of the pocket calculator-a device that ushered in modern mathematics, helped build the atomic bomb, and went with us to the moon-and the mathematicians, designers, and inventors who brought it to life.



Starting with hands, abacus, and slide rule, humans have always reached for tools to simplify math. Pocket-sized calculators ushered in modern mathematics, helped build the atomic bomb, took us to the bottom of the ocean, and accompanied us to the moon. The pocket calculator...