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IBM 402

IBM 402

Tabulating machine introduced in 1949.

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Share of the 127 clicks on its links

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    Tabulating machine introduced in 1949.

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Share of the 237 readers arriving from another article

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    Tabulating machine introduced in 1949.

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    Control panel using electrical patch cords.

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    Late 19th-century machine for summarizing information stored on punch cards.

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    Process to create executable computer programs.

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    Punched card reader for early computers.

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