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.
Be Calc
Serge Devidts' collection of vintage electronic calculators and some other pieces of old technology.
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 petition.
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.
Calculators 3000
A software simulator of Soviet calculators like B3-34, MK-61, MK-52 and others. Program is available for Windows OS.
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 cassette interface.
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.
The Famous Slide Rule Page
Pictures and descriptions of The Castell Addiator and The Rapid-Calcolo.
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