From the early 20th century into the 1970s, Americans used punched cards to enter data onto tabulating equipment and then electronic computers. This early key-operated punch is based on patents of the ...

(1) See loyalty punch card. (2) An early storage medium made of thin cardboard stock that held data as patterns of punched holes. Also called "punched" cards, each of the 80 or 96 columns held one ...

If you mention punch cards to most people, they’ll think of voting. If you mention it to most older computer people, they’ll think of punching programs for big computers on cards. But punched cards ...