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  2. Punched card - Wikipedia

    en.wikipedia.org/wiki/Punched_card

    A punched card (also punch card [1] or punched-card [2]) 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 . Punched cards were widely used in the 20th century, where unit record machines, organized into data processing systems, used ...

  3. Computer programming in the punched card era - Wikipedia

    en.wikipedia.org/wiki/Computer_programming_in...

    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. The term is often used interchangeably with punch card, the difference being that an unused card is a "punch card," but once information had been encoded by punching holes in the card ...

  4. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

  5. Punched card sorter - Wikipedia

    en.wikipedia.org/wiki/Punched_card_sorter

    Punched card sorter. A punched card sorter is a machine for sorting decks of punched cards . Sorting was a major activity in most facilities that processed data on punched cards using unit record equipment. The work flow of many processes required decks of cards to be put into some specific order as determined by the data punched in the cards.

  6. IBM 1402 - Wikipedia

    en.wikipedia.org/wiki/IBM_1402

    The IBM 1402 was a high-speed card reader/punch introduced on October 5, 1959 as a peripheral input/output device for the IBM 1401 computer. It was later used with other computers of the IBM 1400 series and IBM 7000 series product lines. [1] [2] It was adapted as the IBM 1622 Card Read-Punch for the IBM 1620 [3] and provided the basic design ...

  7. Optical character recognition - Wikipedia

    en.wikipedia.org/wiki/Optical_character_recognition

    Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene photo (for example the text on signs and billboards in a landscape photo) or from subtitle text ...

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