Calculators
Anita Calculator Simulators
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.
Bring Back the HP 15C
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 petiti…
Calculating Machines
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.
Calculator Collecting
Webring designed to allow navigation between similar sites dealing with the hobby of collecting, and history of electronic calculators.
Calculator Technical Information
Technical information about many calculators, including chip pinouts and self-test sequences, and patent information.
Calculator's Pages
A collection of early mechanical calculating machines and other calculating devices.
Casio FX-700P Programmable Calculator
Technical information about hardware, interfacing, and programming of this vintage device. Includes a construction project for a storage device to emulate the original FA-3 cassett…
Collection of Calculators, Portable Computers and Vintage Electronics
Calculators from the '70s, and famous home and personal computers from '80s. Photos, historic information and links to other resources.
Curta Calculating Machines
Links to useful sites about the Curta. Also documents the full disassembly of one, with pictures.
Datamath Calculator Museum
An overview of the calculators manufactured by Texas Instruments Inc. from the famous Datamath (1972) to the modern Graphics calculators, with history and articles.
EEC - Early Electronic Calculator Technology Reference
A source of information about the technology used in the construction of early electronic calculators. Includes a reverse-engineering project.
Electronic Calculator History and Technology Museum
Preserving the history of electronic calculators with information and photographs of early desktop and pocket calculators.
Gregory Escov's homepage
Some articles about Russian made calculators, including undocumented features and error conditions.
HP Collection
Matthias Wehrli's collection of HP calculators and accessories. Includes photographs and specifications for items in the collection.
HP-41 Archive Site
A library of information about the HP-41 series calculators, with emulators, publications, FAQ, and related links.
Illustrated Calculating Machines by Ernst Martin
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 th…
Mechanical Calculating Machines
Mechanical calculating machines from a collector's point of view, with articles and links to relevant sites.
Museum of Pocket Calculating Devices
A gallery containing many varieties of pocket calculators, slide rules, and abacuses.
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