Who invented the arithmometer: Pierre-Marie-Alexis Millardet, Anselmo Gavioli, Nicolas Appert or Thomas de Colmar?

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The arithmometer was the first digital mechanical calculator robust enough for daily office use.

Learn more on Codexery: Arithmometer in French Inventions

What does the amateur radio term 'CQ' mean when transmitted?

What does the Q-code 'QTH' mean in amateur radio communication?

What does the abbreviation 'FPV' stand for in the context of drone piloting?

What does ESC stand for in the context of electric RC vehicles?

What term describes the flight mode where a drone autonomously follows a moving subject using GPS or visual tracking?

What refresh rate, measured in hertz, became the standard baseline for competitive gaming monitors, doubling the traditional 60Hz?