A 3D-printed punch card reader: the first step to a working printed computer. Chris Fenton hopes to build a working electromechanical computer out of parts made by a 3D printer.

This chrome-plated hollow brass cylinder has embossed on its outer surface the numbers and letters for an 80-column IBM punch card. Sections of the card are for several quantities associated with ...

And as with all of our books and printed materials, punch cards also represented a significant energy burden. Factoring in the paper production, the transport, the machines, ...

Undeterred, he decided to make a punch card-to-keyboard interface using optical parts from disassembled HP print stations. Specifically, he took apart the slotted optical interrupter switches to ...

A 35-LED matrix with a 3D-printed diffuser and case form the display, with trivia questions and their answer as a QR code standing in for the punch-cards.He also added a pair of user consoles, so ...

The device attached to a weaving loom and used printed punch cards to "program" intricate patterns in the woven fabric. One of these devices, circa 1850, just sold for $43,750 at Sotheby's annual ...

This cream-colored punch card with dark blue printing is the statement of earnings and deductions for E. N. Sivowitch, issued by the General Services Administration. Elliot Norman Sivowitch was a ...

The Floyd County Museum has an estimated 250,000 punch cards from between 1954 through 1976, each one serving as a sort of ...