Punch card reader

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Punch card reader Type 405 from Control Data
Punched card reader with inserted pile of punched cards, to the left of it magnetic tape rolls on a transport trolley

A punch card reader is a peripheral device of a computer that reads punch cards as an input medium and makes their content available to the central unit for processing.

When reading, the punch cards are sequentially guided to a sensing station, where the characters punched as holes are identified and converted into an electronic code . To process different types of punched cards , special types of readers are / were used.

In the mid-1960s, devices with a reading performance of 18,000 to 96,000 cards per hour were available.

A punch card punch is used to create the punch cards .

The processing of punched cards applies, of exceptions aside, since the mid-1970s as a historical epoch of data processing .

See also

Individual evidence

  1. ^ Computer model catalog

literature

  • Werner Dirlewanger, Ludwig Hieber, Helmut Rzehak: Construction of data processing systems. Walter de Gruyter, 1976, ISBN 978-3110046175 , p. 161 ( limited preview in the Google book search).

Web links

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