Punch-card meaning

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A medium for feeding data into a computer, essentially a card punched with holes or notches to represent letters and numbers or with a pattern of holes to represent related data.
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A machine-readable card in which information is encoded as a pattern of punched holes, for interpretation by a data-processing machine.
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A card that can have holes or notches cut in it, especially one for storing data, that can be sorted according to combinations of holes present or absent.
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(computing) Such a card, the size of a US dollar bill, having 80 columns of 12 rows used in early mainframe computers.
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A card given to a customer and punched with a hole at each purchase, allowing a reward to be claimed when fully punched.
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