(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 ...

Punch cards have been used to control the operation of machinery from the early nineteenth century, when the Frenchman Joseph Marie Jacquard patented an attachment to a loom in which a series of ...

Ever wondered how and where these peta /exa/zetta bytes of data are stored? The story of large-scale data storage can be traced back to 1890 US census when punch cards – called electromechanical ...