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A '''punched card''', '''punch card''', '''IBM card''', or '''Hollerith card''' is a piece of [[paperboard|stiff paper]] that contains [[Digital data|digital]] information represented by the presence or absence of holes in predefined positions. Now an [[obsolete]] [[recording medium]], punched cards were widely used throughout the 19th century for controlling [[loom|textile looms]] and in the late 19th and early 20th century for operating [[fairground organ]]s and related instruments. They were used through the 20th century in [[Unit record equipment|unit record machines]] for input, processing, and [[computer storage|data storage]]. Early [[digital computer]]s used punched cards, often prepared using [[keypunch]] machines, as the primary medium for input of both [[computer program]]s and [[Data (computing)|data]]. Some [[voting machine]]s use punched cards.<noinclude>
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