page_title: Punched card
section_title: IBM 40-column Port-A-Punch card format
hierarchical_section_title: Punched card / Card formats / IBM 40-column Port-A-Punch card format
caption_attribution_description: Español: Tarjeta perforada un IBM System/3. La terjeta tiene 82,5 mm de ancho por 66,7 mm de alto y un espesor de 0,17 mm. English: IBM System/3 punched card. This is a digital photograph Arnold Reinhold took on August 11, 2004 of an w:IBM System 3 punch card. Reinhold punched the card at an IBM sales demonstration that he attended in the early 1970s. The card is 3-1/4 inch wide by 2-5/8 inch high by 0.007 inch thick. The card itself is utiltiarian in purpose and was created before 1975 with no copyright notice. The text punched on the card was written by Arnold Reinhold.
context_page_description: A punched card or punch card is a piece of stiff paper that can be used to contain digital data represented by the presence or absence of holes in predefined positions. Digital data can be used for data processing applications or used to directly control automated machinery.
  Punched cards were widely used through much of the 20th century in the data processing industry, where specialized and increasingly complex unit record machines, organized into semiautomatic data processing systems, used punched cards for data input, output, and storage. The IBM 12-row/80-column punched card format came to dominate the industry. Many early digital computers used punched cards as the primary medium for input of both computer programs and data.
  While punched cards are now obsolete as a storage medium, as of 2012, some voting machines still use punched cards to record votes.
caption: IBM 96 column punched card
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