Pascal's calculator - Information Science - 3077 - kuliahkaryawan.widyakartika.ac.id
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Blaise Pascal – Computer Timeline
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How long have computers been around? What year was the first computer made, and who made it? - Quora
José Halloy on Twitter: "9 mechanical calculator invented by Blaise Pascal in 1645 still exist today, the first and only working in the 17th c http://t.co/MXwA6kmPzH" / Twitter