Ancient Web: The Old Calculator Museum
The Old Calculator Web Museum has been online since 1997, documenting early electronic calculators with hand-written HTML, working machines, manuals, advertisements, and memories from the people who built them.
calculators
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Ancient Web: Rechenmaschinen-Illustrated Put the History of Calculating Machines Back Online
Rechenmaschinen-Illustrated turns Ernst Martin's classic history of calculating machines into an illustrated online reference, adding photographs, articles, manufacturer data, and collector research around mechanical calculators.
Ancient Web: Sliderule.ca Keeps the Calculator That Doesn't Add Alive
Eric Marcotte's Sliderule.ca preserves slide-rule history, operating theory, manuals, restoration advice, scale references, and a large photographed collection built before electronic calculators erased the tool from daily life.
Ancient Web: A Collector Mapped the Strange History of Soviet Calculators
Sergei Frolov's Soviet Calculators History combines a collector's hardware knowledge with the story of Russian abacuses, slide rules, electronic calculators, books, and technical literature.
Ancient Web: Vintage Calculators Became a Source for Real Museums
Nigel Tout's Vintage Calculators Web Museum is an old specialist reference whose model pages and research have been cited by the Smithsonian, the Library of Congress, collectors, and other calculator historians.