<architecture> A prototype computer based on vacuum tubes and other esoteric technologies. Chronologically, any computer designed before the mid-1950s. Examples include Howard Aiken's Mark 1 (1944), Maunchly and Eckert's ENIAC (1946), and the IAS computer.
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Nearby terms: first class module « First Fit « first generation « first generation computer » first generation language » first-in first-out » first normal form