In the early 1950s, Harvard psychologist and new father B. F. Skinner turned his attention to arithmetic teaching. He argued that such instruction could be carried out by machine, and designed ...
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'National treasure': Christie's suspends sale of Blaise Pascal's 17th century calculating machine
The sale of an ancient arithmetic machine known as the 'Pascaline' has been suspended after a French administrative court blocked its export. Leading auction house Christie's decided to call off its ...
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