Punch card

The punch card (or "Hollerith" card) is a recording medium for holding information for use by automated data processing machines. Made of stiff cardboard, the punch card represents information by the presence or absence of holes in predefined positions on the card. In the first generation of computing, from the 1920s into the 1950s, punch cards were the primary medium for data storage and processing. Eventually the punch card would be phased out and replaced with huge floppys for media storage, for loading data, in the late 1970's, early 1980's.

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They were an important medium, particularly for data input, well into the 1970s, but are now long obsolete outside of a few legacy systems and specialized applications.

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Data processing: Data processing is any computer process that converts data into information. The processing is usually assumed to be automated and running on an a mainframe, minicomputer, microcomputer, or personal computer. Because data are most useful to human beings when well-presented collectively as informati...

Computing: Originally, the word computing was synonymous with counting and calculating, and a science that deals with the original sense of computing mathematical calculations....

1920s: Sometimes referred to as the "Jazz Age" or primarily in North America as the "Roaring Twenties"....

Punch card related Images and Photos (experimental)

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