Links to other Calculator Sites
Links to other calculator related sites on the Web
If you have other calculator, calculating device, early electronics, or history-of-computer related links you think should be here, please contact us. We also invite readers whose personal web pages have calculators or calculator themes to be added. Just drop us a line with the site address.
If you have a site listed and you feel I should modify the listing or address, please let me know. (Please write up a one line description of your site for me to include.) I will be happy to modify this list.
Please note that site addresses can change. If a link does not work try searching for the site with a search engine, such as Google.
To translate a site into another language try running it through the Babelfish automatic translator at http://babelfish.altavista.com/. Although not perfect it does allow much of the information on the site to be understood.
In no particular order, here are some great calculator websites!:
- A site associated with this one which gives details about the Bell Punch Company, its mechanical calculators and the fascinating story of the development of the Anita electronic calculator, the world's first electronic desktop calculator, and subsequent developments is Bell Punch Company and the Anita Calculator.
- Rick Bensene's Old Calculators Web Museum has very comprehensive reviews of a vast number of mainly vintage desk calculators, with many photographs.
- Katie Wassermann has a growing list of manuals for electronic calculators, which are downloadable in pdf format, at http://www.wass.net/manuals/.
- Ernie Jorgenson's Office Machine Americana site at http://users.lewiston.com/ejorgens/office/index.htm - Old calculator and office machine manuals.
- Very interesting old advertisements for calculators have started to appear on the YouTube site as video clips. For instance there are videos of the Sharp EL-8 (there called the Sharp LC-8) at http://www.youtube.com/watch?v=nCcgoTc8AQc and http://www.youtube.com/watch?v=uyaJ3YgtjWo, where it is "the world's smallest electronic calculator".
- Peter Muckermann, well know as "typenkorb", has a very interesting calculator website with over 2000 excellent photographs, featuring many European market calculators, at www.eepcworld.de.
- Bletchley Park, at Bletchey, 35 miles north of London, England, has a website at http://www.bletchleypark.org.uk.
It has exhibits of WWII coding machines & code-breaking machines, old computers and military communications. A highlight is the reconstructed Colossus code-breaking computer of the 1940s.
The National Museum of Computing at Bletchley Park has mechanical and early electronic calculators on display, and also early personal computers powered up which can be operated by visitors. It has its own website at http://www.tnmoc.org/.
- Herbert Schneemann and Walter Szrek have a site with a lot of interesting photographs and very useful, and hard to find, information about mechanical calculators, at http://www.rechenmaschinen-illustrated.com/.
- Frank Boehm's elektron.net site at www.elektron.net - Has many photographs, mainly of hand-held calculators.
- Rick Furr's "The Calculator Reference" includes fascinating pages about Curta at http://www.vcalc.net/cu.htm - Details of Curta calculators and links to more information.
- The Museum of HP Calculators at http://www.hpmuseum.org/ - Technical details and superb photographs of vintage HP calculators. The history of calculators section is also excellent with simple descriptions of the operation of mechanical calculator mechanisms.
- Tom Jenning's "Nixie Indicators and Decimal Counting Tubes" pages at http://www.wps.com/texts/decimal-tubes/.
- Ray Mackay's site at http://www.dotpoint.com/xnumber/madas.htm - The history and internal workings of Madas calculators.
- Christofer Nöring's Comptometer page at his site at http://w1.131.telia.com/~u13101111/comp.html - There are also pages on other calculators.
- An excellent source of information on Felt & Tarrant Comptometers is at http://www2.cruzio.com/~vagabond/ComptHome.html
- History of Odhner mechanical calculators site at http://mywebpages.comcast.net/wtodhner/
- James Redin's extensive site at http://www.dotpoint.com/xnumber has sections on different types of calculators.
- Andrew Davie's "must-see" page deals with Soviet calculators. He does a great job showing various models from different angles and adding some insight to the calculators he has. He also has Kenton Green's landmark article on the history of Soviet calculators.
- Sergei Frolov's Soviet Calculator Collection is at http://www.rk86.com/frolov/calcolle.htm. Sergei has also written a great article on the history of Soviet Calculators which is at James Redin's site.
- Gregory Escov's site about Soviet programmable calculators.
- Dejan Ristanovic's site at www.ti59.com enthuses over the Texas Instruments TI-59 programmable calcuator and tells you everything that you never knew about it. One is by and the other is by Sven Karkling at www.accessv.com/~sven/ti59/
- Viktor Toth's site has a lot of information about Programmable Calculators, including the TI-59.
- Sinclair site at http://www.nvg.ntnu.no/sinclair/
- Enrico Tedeschi's site at, http://www.etedeschi.ndirect.co.uk/sinclair/sinclair.htm - Sinclair products & the book "Sinclair Archaeology".
- Joerg Woerner's site has an incredible amount of information and photographs on Texas Instruments calculators, and others - www.datamath.org
- A site dedicated to Vintage Mechanical Calculators is http://www.dotpoint.com/xnumber/vintage.htm
- There is an immense amount of information at the Encyclopaedia of Mechanical Calculators site at http://www.rechnerlexikon.de/wiki.phtml. The site is in German with parallel translations into English, French, and Italian. Feb 10.
- Sinichiro Osaki's Pocket Calculator Museum at http://www.dentaku-museum.com/ gives fascinating information about early Japanese electronic calculators and their development, something we collectors/researchers have needed for quite a while. If you click on the "English Here" button the site is run through an automatic translator which, although not perfect, gets the main information across.
- Gerhard Wenzel's Museum of Pocket Calculating Devices.
- Mike Sebastian's Calculator Technical Information Site
- Brent Hilpert has brilliantly reverse-engineered several early calculators, including the Casio AL-1000 and Facit 1123, and has published detailed information and simulators on his Early Electronic Calculator Technology Reference.
- David Gowing's Collectible Electronics
- Pepe Tozzo's "Retrokit" electronic calculator site
- Gene Wright's HP/TI site with pictures and lots of programs.
- Alex Knight's "Calculator Technology Archive Web Page" site has information on the technology behind early model electronic calculators, including photographs and descriptions of the internal workings of the machines.
- On Erez Kaplan's excellent mechanical calculator site, he even has an interactive 1885 Felt & Tarrant "Comptometer" adding machine, one you can actually use!!
- Theo Lumens in Holland recently set up a very nice web site he calls his "Little Calculator Museum." It is definitely worth a visit for see his collection of calculator photos.
- Totalisator History a world's first -- The history of the invention of the worlds first automatic totalisator in 1913 and the company founded in 1917 to manufacture and export totalisator systems which became a monopoly in this field. If mechanical computing existed, this is an example of it on a commercial scale. This is a topic related to mechanical calculators. See the section titled "Mechanical aids to calculation".
- "How to Collect LED Pocket Calculators by Larry Gilbert (located on Enrico Tedeschi's web site)
- 30 years of Intel innovation including information on the 4004, one of the world's first microprocessors, which was designed for use in a calculator.
- Craig Finseth's awsome HP Database and various HP links.
- Hal Layer's Mind Machine Museum with over 100 artifacts illustrated and identified
- The eBay U.S. auction website at www.ebay.com always has many vintage calculators to bid on. Search on "calculator". You can also try the eBay sites in other countries, or choose "any country" on the Advanced Search page.
- Commodore history can be found at http://amiga.emugaming.com/commodore.html and http://www.commodore.ca/history/company/early_commodore_history.htm.
- Dave May has a site for electronics including calculators and LED watches (and other cool stuff). It's located at http://www.collectors-tech.com.
- Bruce Rogers has calculator photos on his site at http://www.brogers.addr.com/Web/ including HP and TI pics as well as some other pocket types. He has some pretty nice desktop models depicted also.
- The Computational Collection of the Instituts für Mathematik und Informatik Ernst-Moritz-Arndt-Universität Greifswald at http://www.uni-greifswald.de/~wwwmathe/RTS/node2.html. This has details and photographs of many calculators and other calculating devices from around the world. Although in the German language much is easily understood by non-speakers and the photographs are very interesting.
- John Wolf's Web Museum features calculating machines and mechanical music. Of special interest are the sections on the Madas 20ATG mechanical calculator, which shows this machine, with automatic multiplication and division, stripped down to its individual mechanisms, and also for an Odhner machine. These illustrate the awesome array of precision components required in this sort of calculator.
- A site with historic information about the calculator chip manufacturer Mostek is MostekLives.
- Guillermo Castarés has a new calculator site with photographs of unusual Argentinian calculators. Although in Spanish it is easy to navigate and view the photographs - see it at http://www.calculators.com.ar/ .
- "The Friden Web Site: The Story of Carl Friden and His Company" by Frank Rauck has lots of interesting details about Karl Friden, the Friden Company, and Friden calculators.
- Christoph Lorenz has an interesting new website featuring 1970s calculators and more, at http://www.christophlorenz.de/calc/index.php.
- An interesting site with photographs of most (all ?) Commodore calculators can be found at http://www.emunova.net.
- Emil Dudek's Vintage Technology site at www.vintage-technology.info has interesting photographs and information about vintage calculators, and much, much more vintage technology.
- Hans Bloemen (aka "Flowercalc") has a vintage calculators website at www.calculatormuseum.nl. Especially interesting is his summary list of calculator companies and the calculators they produced.
- Valéry Monnier has two very interesting websites with many excellent photographs and diagrams. www.arithmometre.org is devoted to the pioneering Thomas de Colmar mechanical arithmometers and www.ami19.org has a great deal of information about Arithmetical Machines and Instruments of the 19th century.
- If you think that LCD calculators are boring have a look at some of the strange models at The Classic LCD Calculator Museum, produced by Jay and Paul. Most of these are calculators with other features.
- If you want to see how a Bohn Contex 10 mechanical calculator was repaired, with many photographs and a description of how this 10-key calculator works, see http://www.csparks.com/contex/index.html.
- Takaharu Yoshida has an interesting site showing lots of excellent photographs of vintage Japanese desktop calculators at http://takasun-lookup.web.infoseek.co.jp/index.html. Some of the site is in English, and the Japanese can be translated using Babelfish automatic translator at http://babelfish.altavista.com/.
- Nathan Zeldes has a website in a very readable "show and tell" style which features some very unusual items, at http://www.nzeldes.com/. See the History of Computing section for calculators and computers.
- Guy Ball's Old Calcs site is now amalgamated with this site.
Guy also has a site dedicated to LED calculator watches and LED watches at http://www.ledwatches.net, where there is lots of information about vintage 1970s LED watches, pictures and links.
- Kashif Hussain has a Vintage Watch site at http://www.vintagewatches.tk/ which also includes vintage calculators, and other old technology, for sale.
- Patent Search Page -- Interesting Info (& great fun), search for "calculator"
- If you are also interested in slide-rules try Ron Manley's interesting site at www.sliderules.clara.net
- Peter Kernwein has a site with photographs of his mechanical and electronic calculators, and computers, at http://www.peterkernwein.de/.
- Noël Jouenne has a site with photographs of his mechanical and electronic calculators at http://perso.orange.fr/noel.jouenne/calculatrices.html. His home page is at http://perso.orange.fr/noel.jouenne/index.html where the link "Innovations et calculatrices" takes you to French advertisements and articles on early electronic calculators.
- Giorgio Cicerchia has on his site a section with photographs and details of mechanical and electronic calculators, and vintage technology, at http://web.tiscali.it/cicerchia/.
- Gerhard Kreuzer has a Computer Museum section on his site with photographs of some vintage calculators and PDP8 computer at www.tuko.at.
- A very interesting site about Soemtron electronic calculators, which were early electronic desktop models manufactured in the then East Germany (DDR), is at http://www.soemtron.org/index.html
- Thomas Denker has a fascinating "working" Hewlett Packard HP-45 on his website at http://www.t-denker.de/hp45/, which you can try out.
- Kees van der Sanden's "My Hewlett Packard calculator collection" has interesting information and documents about Hewlett Packard and other RPN calculators. Mar 10.
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