Question

write short notes on punched card machine​

Answer 1

Explanation:

These are machines that that punch holes in stiff paper cards in selected positions within fixed rows and columns to record information that can be read back or interpreted later by other machines called card readers, which are integrated with tabulators, computers, or other devices.

Answer 2

Answer:

A punched 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 position.