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
Blaise Pascal creates the Pascaline, or Pascal's calculator - Event - Computing History
Mechanical calculator - Wikipedia
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Blaise Pascal - first digital calculating machine | Educalc.net
History of Computer | Pascaline Calculator - YouTube
1.7 Pascal and the Pascaline | Bit by Bit
Pascaline | Mechanical Calculator, Addition Device, Subtraction | Britannica
Pascal's calculator - Wikipedia
Biography of Blaise Pascal, Inventor of the Calculator
Retrotechtacular: Pascal Got Frustrated At Tax Time, Too | Hackaday
Calculating machine designed by Pascal] / Louvet sculpt. Rue Galande No. 51. | Library of Congress