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, ...

Q: I was wondering what happened to the Allentown Comptometer School that was directly across from Hess’s Department Store? I don’t even know what a Comptometer was, but I remember the school. A: The ...

This full-keyboard non-printing adding machine represents the successful adoption of mechanical aids to computation by American scientists. It was one of several computing devices owned by the ...

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 ...

This story was submitted to the People's War site by the Dunstable At War Team on behalf of the author and has been added to the site with her permission. The author fully understands the site's terms ...

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 ...

This full-keyboard non-printing adding machine has a copper-colored steel case. The keys are in ten columns, colored according to the place value of the digit entered. Complementary digits are ...