From the early 20th century into the 1970s, Americans used punched cards to enter data into tabulating equipment and then electronic computers. This is an early key-operated punch, based on patents of ...

Computing used to run on punch cards. Great stacks of cards would run middling programs, with data output onto more punched cards in turn. [Nii] has built a machine in this vein, capable of punching ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In the 1880s American engineer Herman ...

Over the years, the rows of metal slats lining the beds of flat sheet laser cutting machines have become a staple in many shops. Slats are simple, inexpensive, and able to support heavy plate. But the ...