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In 1623 William Schickard invented a calculating machince called Speeding Clock or Calculating Clock. The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell.
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Schickard succeeded in designing and building the first mechanical calculating device.
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Schickard’s accomplishment went unknown and unheralded for 300 years, until his notes were discovered and publicized.
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it was not until Blaise Pascal’s invention gained widespread notice that Schickard's mechanical calculation came to the public’s attention.
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An improvement on Schickard’s design, it nevertheless suffered from mechanical shortcomings and higher functions required repetitive entries.
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In 1885, Burroughs filed his first patent for a calculating machine.
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In 1892 his patent was for an improved calculating machine with an added printer. The Burroughs Adding Machine Company in St. Louis, Missouri, went on to great success popularizing the inventor’s (Schickward) creation.
