P.S. :
On this site I use some information which I found elsewhere on the internet. If you are the owner of such info and feel abused or would like to be mentioned please let me know.
On your request I will remove such info or be glad to mention the source.
Thanks to all those collectors who took care of making so much knowledge and experience available to all of us.
Contains an extensive catalogue of vintage electronic calculators.
The catalogue shows mark and type, year of introduction , classification-tags and a lot more interesting information
This site contains HTML-versions of some original documents related to the early history of calculators. It includes many manuals.
A very interesting site with a lot of information about high-end mechanical calculators. It also contains easy-to-understand drawings regarding common main working principles.
Robert Mařík’s site contains interesting as well as funny stuff regarding mechanical calculators and calculations on such machines.
A very large collection of ink ribbons and other calculator and typewriter related supplies can be ordered from this web shop. There is a Dutch language webshop and another one in English on Etsy.
I ordered ribbons several times and experienced fine communication, fast delivery and a high level of user friendliness each time. The actual collection is much larger than shown on these web sites. If you can’t find what you’re looking for or are not sure which product fits your machine, ask for help.
The site of Gerald Saudan is dedicated to Madas calculators. For historical as well as technical information this is a marvellous site.
In addition to information on Rechnerlexicon.de this link brings you to pages containing extra information about the Walther EMKD.
Madrona.ca, the site of Brent Hilpert contains a lot of detailed technical information of many electronic calculators including reverse engineered schematics of the Canon 131s.
Wim owns a lot of very nice and some very rare calculators. They all come with a description and lots of perfect photo’s, also of the internals of each machine. For some there is a video.
His site also contains detailed information regarding the many different technologies used in mechanical calculators.
A yearly printed overview of relevant office equipment available in that year in Germany. Most calculators are mentioned with there price.
Contains a large data base of mechanical calculators. Available in four languages.
Contains a large data base of electronic calculators
Contains a lot of information about mechanical as well as electronic calculators. If you are interested in company history or working principles, don’t, don’t miss this site. If you want to try a repair, look at the Technical and Reference Section. It’s very very helpful.
Is dedicated to Texas Instruments calculators. Contains extensive catalogue of TI calculators and also detailed historical information regarding TI, including the CalTech project which led to the development of the Canon Pocketronic.
www.oldcalculatormuseum.com/pocketronic.html contains detailed information about the way the Texas Instruments CalTech project led to the development of the Canon Pocketronic.
The website of Jaap Scherphuis contains a huge number of mechanical calculators, many high-quality photos of each calculator and a large collection of related publications like articles, adverts and brochures.
On his website Thomas Kirchhof shows an impressive collection of mechanical and electronic calculators.
| Mechanical Calculators |
| Electronic Calculators |
| Typewriters |