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John Vincent Atanasoff was the first American to design and build an electronic digital computer, the ABC. It was finished in 1942, but Atanasoff and his assistant Clifford Berry moved on to war related work and abandoned it. It was not a programmable computer however, it was special purpose designed to solve simultaneous equations of up to 29 variables (very big systems in those days, impractical to solve on desk calculators of the time). It was also the first computer of any kind to use Dynamic memory (capacitor based memory similar to modern DRAM).

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14y ago

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