Mechanical calculator

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1700: Pre-Steampunk? - The Staffelwalze, or Stepped Reckoner, a digital calculating machine invented by Gottfried Wilhelm Leibniz around 1672 and built around 1700.  It was the first known calculator that could perform all four arithmetic operations; addition, subtraction, multiplication and division. 67 cm (26 inches) long. The cover plate of the rear section is off to show the wheels of the 16 digit accumulator. Mechanical Calculator, Computer History, Library Programs, Flipped Classroom, Industrial Photography, Multiplication And Division, Two Way Radio, Student Created, Astronomer

1700: Pre-Steampunk? - The Staffelwalze, or Stepped Reckoner, a digital calculating machine invented by Gottfried Wilhelm Leibniz around 1672 and built around 1700. It was the first known calculator that could perform all four arithmetic operations; addition, subtraction, multiplication and division. 67 cm (26 inches) long. The cover plate of the rear section is off to show the wheels of the 16 digit accumulator.

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Curta Calculator, Computer History Museum, Calculator Design, Mechanical Calculator, Exploded View, Slide Rule, Computer History, Pattern Recognition, Pc Computer

You could be forgiven for thinking that being called a “Curta-cranker” was a bit of an insult. The nickname describes someone who constantly cranks their Curta (!) to make calculations. However, the Curta calculator, as the hallowed invention of concentration camp survivor Curt Herzstark, has become such a collector’s item these days, that just to have one in your possession is a fact worth celebrating. It means you are one fortunate, and determined, collector.In a sense, I am a that…

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