Question

Explain punched cards types not punched cards​

Answer 1

Explanation:

A punched card (also punch card[1] or punched-card[2]) 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 used to directly control automated machinery.

A 12-row/80-column IBM punched card from the mid-twentieth century

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.

Answer 2

Answer:

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