The Addiator is a mechanical calculating device or adding machine that was invented in the early 20th century. It is designed to perform addition and subtraction using a system of sliding beads or similar mechanisms. The device typically features a series of rods or levers that can be manipulated to input numbers, with the results displayed through mechanical indicators. The Addiator gained popularity for its simplicity and ease of use, making it a useful tool for calculations in various fields, including commerce and education.
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