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The earliest known calculating device is probably the abacus.
Still, in complexity and audacity of design, it dwarfed any calculating device then in existence.
Nevertheless, ENIAC was the most powerful calculating device built to date.
Abacus, plural abaci or abacuses, calculating device, probably of Babylonian origin, that was long important in commerce.
De Colmar effectively met this challenge when he built his Arithmometer, the first commercial mass-produced calculating device.
The S-parameters help in calculating device stability by determining a term called the Rollett Stability Factor K.
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But what captivates the first-time visitor immediately is the living museum of calculating devices on display throughout the building.
In the early decades of the 20th century, desktop adding machines and other calculating devices were developed.
Calculating devices took a different turn when John Napier, a Scottish mathematician, published his discovery of logarithms in 1614.
Analog calculating devices based on Napier's logarithms representing digital values with analogous physical lengths—soon appeared.
Peuerbach composed other treatises, most still in manuscript, devoted to elementary arithmetic, sine tables, calculating devices, and the construction of astronomical instruments (gnomons, astrolabes, and quadrants).
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