Mechanical Calculator

If you are geeky and calculators are your thing then maybe you need to step back a bit and check out the Curta Calculator. It was built in 1948 by Curt Herzstark. It is capable of all the basic functions of addition, subtraction, multiplication and division. If you are very clever you can also get it to work out square roots too. It uses a cylinder with numbers placed around this cylinder. Below you will find a video of the Curta Calculator being used.

Via: Gizmowatch

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