Put away the laptop, the calculator and the adding machine – and try filing your taxes using an abacus. That’s right, an abacus. We haven’t always been as high-tech as we are today. Before there was ...

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 ...

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 ...

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 ...

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 ...

SIR – I can well remember comptometers (Letters, March 31). I worked for London Transport in the 1960s in their office at the old Hillingdon Station. There were about 48 women in eight sections and ...