(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 ...

Considering you just can’t go down to Fry’s and buy an IBM 80-column punch card reader, we’re loving [digitatrails]’ clever way of getting data off an otherwise unreadable storage medium.

From punch card-operated looms in the 1800s to modern cellphones, if an object has an "on" and an "off" state, it can be used to store information. In a computer laptop, the binary ones and zeroes ...

If a column has a single punch over a number ... It was common in the old days for cards, tapes, and even disks to store data, and it was up to you to know what kind of data it was.