Mechanical calculators

Calculators

Mechanical calculators

I do not know how to edit a category, but I propose that Slide Rule, Abacus, Napier's bones, and Mercedes (calculator) be added to this category. User:BAxelrod 05:14, 27 Nov 2004 (UTC)

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Words begining with Mechanical_calculators:

Mechanical_calculators
Mechanical_calculators

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