Definitions for punch card
This page provides all possible meanings and translations of the word punch card
punched card, punch card, Hollerith card(noun)
a card on which data can be recorded in the form of punched holes
A card that can have holes or notches cut in it, especially one for storing data, that can be sorted according to combinations of holes present or absent.
Such a card, the size of a US dollar bill, having 80 columns of 12 rows used in early mainframe computers.
A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contained either commands for controlling automated machinery or data for data processing applications. Both commands and data were represented by the presence or absence of holes in predefined positions. Now obsolete as a recording medium, punched cards were widely used throughout the 20th century for controlling textile looms and in the late 19th and early 20th century for controlling fairground organs and related instruments. Punched cards were used through most of the 20th century in what became known as the data processing industry; the use of unit record machines, organized into data processing systems, for data input, processing, and storage. Early digital computers used punched cards, often prepared using keypunch machines, as the primary medium for input of both computer programs and data. As of 2012, some voting machines still use punched cards to record data.
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