This full keyboard printing adding machine is manually operated. It has a metal frame painted black, with a metal keyboard painted green. There are five columns of black and white color-coded plastic ...

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 full keyboard printing manually ...

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 ...