Question

what ie punched card?​

Answer 1

Answer:

A punched card or punch card is a piece of stiff paper that can be used to contain digital data represented by the presence or absence of holes in predefined positions. Digital data can be used for data processing applications or, in earlier examples, used to directly control automated machinery.

Punched cards were widely used through much of the 20th century in the data processing industry, where specialized and increasingly complex unit record machines, organized into semiautomatic data processing systems, used punched cards for data input, output, and storage. The IBM 12-row/80-column punched card format came to dominate the industry. Many early digital computers used punched cards as the primary medium for input of both computer programs and data.

While punched cards are now obsolete as a storage medium, as of 2012, some voting machines still use punched cards to record votes.

Answer 2

Answer:

Punched cards were used for entering input inside first and second generation computers. It was first introduced in the calculating machine-Jacquard's Loom and revolutionized the weaving industry.

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