Invented by Leonardo Torres in 1920, the Torres calculating machine is a machine that solves essential addition, subtraction, multiplication, and division problems using a simple manner. It was a ...

Empire of the Sum: The Rise and Reign of the Pocket Calculator. By Keith Houston. W.W. Norton & Company; 384 pages; $32.50. To be published in Britain in October; £25 WHEN WAS the last time you used a ...

A woman standing next to a calculator taller than herself. Though we may not think about it, math and calculations permeate our everyday lives. We calculate tips at restaurants, determine how much ...

Horiba has filed a patent for an analysis device that can analyze a measurement sample based on spectral data. The device includes a correlation data storage portion that stores correlation data ...