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 ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This lever-set non-printing ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results