punch card

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English

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An 80-column 20th century punch card.
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Alternative forms

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Noun

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punch card (plural punch cards)

  1. 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.
    1. (computing, historical) Such a card, the size of a US dollar bill and having 80 columns of 12 rows, used in early mainframe computers.
      • 2023 November 13, James Somers, “A Coder Considers the Waning Days of the Craft”, in The New Yorker[1], →ISSN:
        Programming by typing C++ or Python yourself might eventually seem as ridiculous as issuing instructions in binary onto a punch card.
  2. 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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