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punched card
(redirected from Control card)

   Also found in: Encyclopedia, Wikipedia 0.05 sec.

punched card

In computing, an early form of data storage and input, now almost obsolete. The 80-column card widely used in the 1960s and 1970s was a thin card, measuring 190 mm × 84 mm/7.5 in × 3.33 in, holding up to 80 characters of data encoded as small rectangular holes.

The punched card was invented by French textile manufacturer Joseph Marie Jacquard in 1801 to control weaving looms. The first data-processing machine using punched cards was developed by US inventor Herman Hollerith in the 1880s for the US census.



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1 can be used as either a closed-loop control card for hydraulic and electro-hydraulic drives or as a command-value generator.
The system is structured for simple control card removal or replacement.
More than a standard optical turnstile, the OptiStile 220SB can be set to either "pop-out" when an unwanted user enters the lane or to open only upon presentation of valid access control card.
 
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