Punch card reader
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
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
Commons : Punch card reader - collection of pictures, videos and audio files