- Vintage Calculators - http://www.vintagecalculators.com/
A celebration of old calculators showing the evolution from mechanical calculator to hand held electronic calculator.
- Mechanical Calculating Machines - http://www.webcom.com/calc/
Mechanical calculating machines from a collector's point of view, with articles and links to relevant sites.
- The Museum of HP Calculators - http://www.hpmuseum.org
Information about every HP calculator made since 1968. Includes photo gallery, old advertisements, operating instructions, pricing information and discussion forum.
- Calculator Technical Information - http://www.calcinfo.com/
Technical information about many calculators, including chip pinouts and self-test sequences, and patent information.
- The Old Calculators Web Museum - http://www.geocities.com/oldcalculators/
Virtual museum of vintage mechanical and electronic desktop calculators from the late 1950s through the late 1970s
- Museum of Soviet Calculators - http://www.taswegian.com/MOSCOW/soviet.html
Displays handheld and desktop calculators from the 1900s to the present, showing interesting features of each.
- Be Calc - http://www.devidts.com/be-calc/
Serge Devidts' collection of vintage electronic calculators and some other pieces of old technology.
- Programmable Calculators - http://www.rskey.org/
A collection of programmable and non-programmable calculators and accessories, with articles and repair notes.
- Soviet Calculators History - http://www.dotpoint.com/xnumber/russian_calcs.htm
Article about the history of the development of Soviet calculators, the features and interesting characteristics of the most relevant models are described.
- Gregory Escov's homepage - http://members.tripod.com/GregEscov/
Some articles about Russian made calculators, including undocumented features and error conditions.
- Datamath Calculator Museum - http://www.datamath.org
An overview of the calculators manufactured by Texas Instruments Inc. from the famous Datamath (1972) to the modern Graphics calculators, with history and articles.
- Yahoo! Groups : oldcalcs - http://groups.yahoo.com/group/oldcalcs/
Bulletin board for collectors of old electronic calculators.
- Curta Calculating Machines - http://www.teleport.com/~gregsa/curta/
Links to useful sites about the Curta. Also documents the full disassembly of one, with pictures.
- Calculator Collecting - http://k.webring.com/hub?ring=calculator
Webring designed to allow navigation between similar sites dealing with the hobby of collecting, and history of electronic calculators.
- Soviet Calculators Collection - http://www.rk86.com/frolov/calcolle.htm
Pictures of calculators from the former USSR. Includes advertisements, articles, and a guestbook. English and Russian languages.
- Stellatron Calculators - http://website.lineone.net/~lineup/st-pages/calcmain.html
An A-Z index of manufacturers, with product photographs, and a timeline of model releases.
- Retrokit - http://www.tozzo.freeserve.co.uk/calc/calc.htm
Photographs of some older calculator models.
- HP-41 Archive Site - http://www.hp41.org
A library of information about the HP-41 series calculators, with emulators, publications, FAQ, and related links.
- Vintage calculators - http://www.netcomuk.co.uk/~wwl/cacls.html
A collector displays his small collection of old calculator models.
- The X-Number World of Calculators - http://www.dotpoint.com/xnumber
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.
- Vintage Calculators - http://www.decodesystems.com/calculators.html
Information and lists of vintage and classic calculators, primarily Hewlett-Packard and Texas Instruments.
- Casio FX-700P Programmable Calculator - http://www.pisi.com.pl/piotr433/index.htm
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.
- The Famous Slide Rule Page - http://www.geocities.com/ResearchTriangle/Forum/7787/sliderule_collecting.htm
Pictures and descriptions of The Castell Addiator and The Rapid-Calcolo.
- The Old Calculator Web Museum - http://www.oldcalculatormuseum.com
Photographs of the exterior and interior of many vintage mechanical and electronic calculators. Also includes vintage advertisements and technical literature.
- Calculator's Pages - http://www.calculators.szrek.com
A collection of early mechanical calculating machines and other calculating devices.
- Calculators 3000 - http://www.emulator3000.emuita.it/c3.htm
A software simulator of Soviet calculators like B3-34, MK-61, MK-52 and others. Program is available for Windows OS.
- Using and Collecting HP Calculators - http://membres.lycos.fr/hpcalc/
Information about various HP calculator models, with photographs. Includes instructions on using some of the special functions of some models.
- Old HP and TI Calculators - http://www.rskey.org/gene/hpgene/
Photographs and information about HP and TI calculators, including many programs.
- Texas Instruments 59 - http://www.ti59.com/index.html
All about the TI-59 programmable calculator, with photographs and information about accessories, documentation and programs.
- Bring Back the HP 15C - http://hp15c.org/
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 - http://www.calculi.nl/
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.
- Anita Calculator Simulators - http://www.lyvedon-way.fsnet.co.uk/calc/CALC.HTM
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.
- HP Collection - http://www.hp-collection.org/
Matthias Wehrli's collection of HP calculators and accessories. Includes photographs and specifications for items in the collection.
- Illustrated Calculating Machines by Ernst Martin - http://www.rechenmaschinen-illustrated.com/
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.
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