High Quality Content by WIKIPEDIA articles! Konrad Zuse's Z3 was the world's first working programmable, fully automatic computing machine; whose attributes, with the addition of conditional branching, have often been the ones used as criteria in defining a computer. The Z3 was built with 2,000 relays. (A request for funding for an electronic successor was denied as "strategically unimportant" ("nicht kriegswichtig")).It had a clock frequency of ~5–10 Hz, and a word length of 22 bits. Calculations on the computer were performed in full binary floating point arithmetic. Z3 read programs off a punched film.

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