HEATKEYS

Wondrous Devices of Genius from the Age of Machines - A Webzeum of Mechanical Calculators

Web site of Nathan Zeldes, devoted to his work and services in Knowledge Worker Productivity consulting, Technology Startup mentoring, and public speaking.

The Museum of HP Calculators displays and describes older Hewlett-Packard calculators. There are also sections on calculating machines and slide rules as well as sections for buying and selling HP calculators, an HP timeline, collecting informatio...

Vintage Calculators: old mechanical & electronic calculators; british hand-held & desk; british sterling currency

History of Computers and Computing - Home page

Buy and sell electronics, cars, clothing, apparel, collectibles, sporting goods, digital cameras, and everything else on eBay, the world

The National Museum of American History is one of the Smithsonian Institution museums located on The Mall in Washington DC.

The Museum promotes research on the evolution of early office technology based on original documents and artifacts and disseminates information about the history of office equipment

The world