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ABC, the Atanasoff Berry Computer. A desk sized special purpose machine designed to solve systems of simultaneous equations of up to 29 variables. Completed in 1942 but never significantly used as designers almost immediately moved on to war work. Machine was scraped during war when university needed more classroom space and it was found a bit too wide to fit through door. Only left today is one of two capacitor memory drums.

A recreation of ABC has been done and it works perfectly. The recreation was made a bit smaller so it fits through doors.

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