This 1942 ad for a comptometer is just perfect because first of all, I had no idea what a comptometer was (a mechanical calculator, basically) and second, the spec sheet is wonderful: no glare dials, ...

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 key-driven ...

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 1927 officials at Felt & Tarrant ...

About this time 130 years ago, Dorr Felt, of Chicago, invented the Comptometer. I learned that while looking up something else. A major method of learning interesting things is to look up something ...

You've got to give Hi Tech Systems some credit for effort: to help their broadcast video controllers stand out at a recent industry expo, they put together the Comptometer, a Steampunk-styled console ...

If you build a specialized type of hardware which, by design, rarely arouses emotions of physical desire in the general populace, you can see how you might have a bit of a challenge promoting your ...

IN acceding to the editor's request to contribute an article to NATURE upon this instrument, I should like at the outset to express the feeling of curiosity with which any one, familiar with the many ...