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May 13, 2013 AT 1:01 pm

The Prodigious Abacus

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2 Comments

  1. This is more commonly called a “nomogram” or “nomograph” … I don’t think I’ve ever heard the French term used before.

  2. According to pighixxx, it’s from an old Italian electronics magazine. “Abacus” may be a direct translation of the Italian.

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