An 11-punch with a digit indicated a negative number ... We occasionally see new card readers. They rarely, though, work with standard cards.

Punch cards were fed into computers by card readers. Punch cards were synonymous with data processing for about 80 years. Concepts were simple: the database was the file cabinet; a record was a ...

Scan and parse a card-image at The Virtual Card Reader! New: Batch punch, read and process cards using the Virtual Card Read-Punch! A long, long, long, long time ago Before the chips, before the ...

A punch-card data entry machine. A deck of blank cards was placed into a hopper, and, upon operator command, the machine fed one card to a punch station. As characters were typed, a series of dies ...