Retro Calculators

Retro Calculators is a personal website (self-described as a 'webzeum') showcasing an individual collector's holdings of mechanical calculators, adders, and slide rules, with photos and occasional videos of items like the Curta, abacus, and various addiators. The site catalogs dozens of specific devices with brief descriptions and links to related collector sites and museums, focusing especially on smaller mechanical calculators and unusually shaped slide rules.