A collection of information about HP, TI and Curta calculators. Includes articles and many related links.
A wealth of information about the HP-75C.
Photographs and information about HP and TI calculators, including many programs.
All about the TI-59 programmable calculator, with photographs and information about accessories, documentation and programs.
Fans of the 15C want Hewlett-Packard to put it back in production. Find a list of reasons to bring it back, the reason it was discontinued in the first place, and an online petition.
The private collection of the Dutch collector Nico Baaijens of mechanical, electro-mechanical and electronic counting, adding and calculating machines. Many pictures and close-ups.
A collection of Sumlock Anita calculators and simulators, and related devices associated with the Sumlock factory in Portsmouth, U.K., in the 60s and 70s.
Matthias Wehrli's collection of HP calculators and accessories. Includes photographs and specifications for items in the collection.
Preserving the history of electronic calculators with information and photographs of early desktop and pocket calculators.
English translation of the most important book on calculating machines "Rechenmaschinen" by Ernst Martin is illustrated on this site. The site includes .pdf version of the book, many interesting pictures of the machines, production years, and articles.
Computers /
Hardware /
Calculators
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