A collection of articles about the history of calculators, mechanical and electronic. Also, a number of on-line calculators, recommended books, and a vintage collectors forum.

Technical information about many calculators, including chip pinouts and self-test sequences, and patent information.

Pictures of calculators from the former USSR. Includes advertisements, articles, and a guestbook. English and Russian languages.

A library of information about the HP-41 series calculators, with emulators, publications, FAQ, and related links.

Webring designed to allow navigation between similar sites dealing with the hobby of collecting, and history of electronic calculators.

Serge Devidts' collection of vintage electronic calculators and some other pieces of old technology.

Links to useful sites about the Curta. Also documents the full disassembly of one, with pictures.

Preserving the history of electronic calculators with information and photographs of early desktop and pocket calculators.

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 source of information about the technology used in the construction of early electronic calculators. Includes a reverse-engineering project.