The Curta calculator

The Curta is a cult mechanical calculator, a complex arrangement of gears and cogs that can be used to perform a wide array of calculations by a combination of rotating and arranging an array of dials and sliders. There are plenty of Curta pages out there, including this great image of the tightly packaged internal mechanism. If you have access to VRML, you can even try YACS (Yet Another Curta Simulator), although there’s a flash version here.

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