Calculator of the day: the Curta

My new book, Empire of the Sum: The Rise and Reign of the Pocket Calculator, will be published in the US on Tuesday the 22nd of August, and to mark the occasion I thought I’d post about some of my favourite calculators. This time, we’re taking a look at the “math grenade”, as William Gibson calls it in his novel Pattern Recognition — the mechanical, cylindrical, pocketable Curta.

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