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 ...
The last Pascaline arithmetic machine in private hands will be sold at Christie’s Paris on November 19 where it is expected to command a handsome sum between €2 million and €3 million ($2.4 million–$3 ...
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 ...
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