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  1. Punched card - Wikipedia

    • One of the most common punched card formats is the IBM 5081 card format, a general purpose layout with no field divisions. This format has digits printed on it corresponding to the punch positions of the digits in each of the 80 columns. 展开

    Overview

    A punched card (also punch card or punched-card ) is a piece of card stock that stores digital data using punched holes. Punched cards were once common in data processing and the control of automated machines展开

    History

    The idea of control and data storage via punched holes was developed independently on several occasions in the modern period. In most cases there is no evidence that each of the inventors was aware of the earl… 展开

     
  1. 一文了解穿孔卡片 - 知乎 - 知乎专栏

  2. Punched card input/output - Wikipedia

  3. The punched card - IBM

    It was one of the earliest icons of the Information Age: a simple punched card produced by IBM, commonly known as “the IBM card.” The card itself was unassuming, a thin piece of stiff cardboard measuring 7⅜ inches by 3¼ …

  4. 打孔卡 - 维基百科,自由的百科全书

  5. Punched card - Wikiwand

  6. Computer programming in the punched card era

    A punched card is a flexible write-once medium that encodes data, most commonly 80 characters. Groups or "decks" of cards form programs and collections of data.

  7. Doug Jones's punched card codes - University of Iowa

  8. 一文了解穿孔卡片 - HeapOverflow - 博客园

  9. Punched card | What is, characteristics, history, how it …

    A punched card is a sheet of cardboard that can store information in binary code. This was the first tool that used informatics to enter information and instructions into computers in the 60s and 70s.

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