IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This ten-key printing electric adding ...

This ten-key printing manual adding machine has a black plastic top, green plastic keys, and a metal mechanism, handle, and base. The number keys are arranged in a block. To the left of these is a ...

Tax preparers no longer use a horse to get to work or a washtub to rinse laundry, yet many continue to keep around a once-indispensable tool that’s slowly becoming antique. Processing Content “I ...

As part of All Things Considered's series on now-obsolete sounds, listeners recall fond memories of the old mechanical adding machine. We asked listeners to send sounds from older technologies, things ...

When we talk about a “computer” today, we generally picture an electronic machine that can perform various kinds of mathematical operations, manage its program flow, move data from one place to ...