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Thomas M. Whitney – Department of Electrical and Computer Engineering
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Powerhouse Collection - Brunsviga mechanical calculator made by Grimme, Natalis & Co
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Pascal's calculator (also known as the arithmetic machine or Pascaline), a mechanical calculator invented by Blaise Pascal in the early 17th century. Pascal was led to develop a calculator by the laborious
Jerry Merryman, the man who helped invent the hand-held calculator, has died | CNN Business
The History Of The Calculator: When was the Calculator First Invented?
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Calculator - Wikipedia
Co-Inventor of the World's First Handheld Electronic Calculator Dies at 86
Who invented the calculator, and in what year? - Quora
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The invention nobody appreciated: the calculator, 50 years on - Gulf Times
The First Mechanical Calculator and the Computer Revolution of the 160 – mimicEducationalRobots