[John Graham-Cumming] might not be the first person to thumb through an old book and find an IBM punched card inside. But he might be the first to actually track down the origin of the cards.

For years I’ve had a crystal clear memory of photographing election workers as they counted punch card ballots. I recalled it in black and white, so that narrowed the search window down to the ...

This key-driven, manual verifier has 15 black rubber keys. Twelve are for the 12 columns on a punch card. These are labeled from 0 to 9, X, and blank. Two other keys move the card one space, and the ...