Empire of the SumStarting 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 changed our world, until it was supplanted by more modern devices that, in a cruel twist of irony, it helped to create. The calculator is dead; long live the calculator. In this