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  1. Wikipedia
    https://en.wikipedia.org/wiki/Punched_card

    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

    一文了解穿孔卡片 - 知乎 - 知乎专栏
    穿孔卡片是什么. 形式上，穿孔卡片就是一张纸卡片。. 这个纸卡片被分为N行M列的格子。. IBM的12行80列的穿孔卡片曾是主流。. 每个格子都可以选择打孔或不打孔。. 可以把它想象成一个大小12*…
    知乎专栏 · https://zhuanlan.zhihu.com/p/415819…
    CC-BY-SA 许可证中的维基百科文本
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  1. Punched Card format的图片

    bing.com/images
    Punched Card format 的图像结果.大小：160 x 206。 资料来源：www.heritagechristiancollege.com
    Punched Card format 的图像结果.大小：120 x 100。 资料来源：template.wps.com
    Punched Card format 的图像结果.大小：187 x 100。 资料来源：en.wikipedia.org
    Punched Card format 的图像结果.大小：70 x 100。 资料来源：ideas.sybernews.com
    Punched Card format 的图像结果.大小：63 x 100。 资料来源：yousquare2.tumblr.com
    Punched Card format 的图像结果.大小：250 x 104。 资料来源：homepage.cs.uiowa.edu
    Punched Card format 的图像结果.大小：194 x 104。 资料来源：data1.skinnyms.com
    Punched Card format 的图像结果.大小：117 x 106。 资料来源：cholonautas.edu.pe
    Punched Card format 的图像结果.大小：135 x 106。 资料来源：en-academic.com
    Punched Card format 的图像结果.大小：144 x 106。 资料来源：www.shutterstock.com
    Punched Card format 的图像结果.大小：114 x 106。 资料来源：www.mightyprintingdeals.com
    Punched Card format 的图像结果.大小：90 x 106。 资料来源：www.supercoloring.com
    Punched Card format 的图像结果.大小：160 x 100。 资料来源：www.youtube.com
    Punched Card format 的图像结果.大小：69 x 100。 资料来源：www.pinterest.es
    Punched Card format 的图像结果.大小：63 x 100。 资料来源：www.thirtyhandmadedays.com
    Punched Card format 的图像结果.大小：180 x 100。 资料来源：www.twinkl.co.uk
    Punched Card format 的图像结果.大小：128 x 100。 资料来源：qcardg.blogspot.com
    查看所有图像
  2. 知乎专栏
    https://zhuanlan.zhihu.com/p/415819018

    一文了解穿孔卡片 - 知乎 - 知乎专栏

  3. Wikipedia
    https://en.wikipedia.org/wiki/Punched_card_input/output

    Punched card input/output - Wikipedia

  4. IBM
    https://www.ibm.com/history/punched-…

    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 …

  5. 维基百科
    https://zh.wikipedia.org/wiki/打孔卡

    打孔卡 - 维基百科，自由的百科全书

  6. Wikiwand
    https://www.wikiwand.com/en/articles/Punched_card

    Punched card - Wikiwand

  7. Wikipedia
    https://en.wikipedia.org/wiki/Computer_…

    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.

  8. uiowa.edu
    https://homepage.divms.uiowa.edu/~jones/cards/codes.html

    Doug Jones's punched card codes - University of Iowa

  9. 博客园
    https://www.cnblogs.com/mmyz-sysu-panjn/p/15365693.html

    一文了解穿孔卡片 - HeapOverflow - 博客园

  10. Euston96
    https://www.euston96.com/en/punched …

    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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