The Curta works by sliding setting knobs on the sides—each knob represents a digit—and turning the crank at the top to perform an equation. At first glance, the Curta mechanical calculator looks like ...
It's been more than 20 years since I bought a physical, hold-it-in-your-hand calculator. I've bought a couple of special-purpose calculator apps, but the very last one I bought was the TI-1726, which ...
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