| A selection of sites I regularly visit or use for reference. Please let me know if you think I have overlooked any interesting/important sites. |
|---|
| Site owner/purpose | Description/reason for my interest |
|---|
| Andries de Man’s site | Prime reference site for original documents on the History of Calculators |
| ARC (ES) | Spanish "Amigos de las Reglas de Cálculo" collectors group |
| Barbara Haeblinger’s site (D) | RECHNERLEXICON: a superb information-rich site & largest encyclopedia of Mechanical Computing |
| Bill Robinson’s list | Prime reference site for everything to do with slide rules with Hyperbolic scales - see also Hyperbolic Archive search link |
| Bob Adam’s site | Collector friend from "Down-Under" with a special interest in Electro & Hyperbolic slide rules - site includes a DB/catalogue of all the known Electro/Electronic slide rule models |
| Books & Manuals search | ISRM's library/archive of over 500 downloadable slide rule related books, manuals, instruction sheets, etc |
| Catalogue search | Herman's Archive: Herman van Herwijnen's (1929–2004) legacy online catalogue of more than 5000 slide rules & images |
| Chris Sangwin’s site (archived) | Many great articles explaining the history and background to slide rules & other mathematical instruments (via Wayback Machine from 2016) |
| Clark McCoys’ site | Prime reference site for everything to do with slide rule maker: Keuffel & Esser (catalogues/manuals/etc) |
| Colin Tombeur’s site | Juggler/collector with special focus on pre WW2 Faber/F-C slide rules but the site also has some innovative specialised rules (e.g. for juggling) he designed & built |
| Daniel Toussaint’s site (F) | LINEALIS: prime reference site for slide rule maker GRAPHOPLEX but also for all kinds of manual calculation instruments |
| Dating & Timeline guide | ISRM's handy "one-stop" aid for dating slide rules from various makers |
| Dave Hoyer’s site | Prime reference site for everything to do with precision, accuracy and significant digits |
| David Green’s site | Prime reference site for everything to do with Planimeters |
| David M Riches’ site | Superb collection of mathematical instruments & slide rules. Prime reference site for slide rule maker: Blundell Harling |
| David Walker’s site | Novel take on accuracy "Typical Slide Rules Under the Microscope" |
| Denis Roegel’s site | LOCOMAT: prime reference site for everything to do with important historical tables |
| Dick Lyon’s site | Prime reference site for everything to do with slide rule maker: Carbic & the Otis King calculator (history, models, types, dating, etc) |
| Dick Rose’s site (dealer) | Vintage Instruments: collector-friendly dealer with an impressive catalogue of slide rules & much more |
| Encyclopaedia of Mechanical Calculating | Rechnerlexikon: rich source of informed articles & patent related information on every possible aspect of mechanical calculating |
| Encyclopedia search | ISRM's extensive glossary of slide rule related terms |
| Fabrizio Brentini’s site (D) | Prime reference site for almost anything related to maker: A.W. Faber/A.W. Faber-Castell |
| Friedrich Diestelkamp’s site | Prime reference site for everything to do with the "big world of small calculators" (Addiatiors) |
| George Keane’s site | Prime reference site for the history of slide rule maker "Festus Mfg. Co." and its successor "The Acu-Rule Mfg. Co." |
| Gerhard Wenzel’s site | Prime reference site for everything to do with pocket calculating devices |
| Giovanni Breda’s site | Cosmopolitan diverse collection of slide rules & mechanical calculators |
| Gonzalo Martin’s site (F) | PhotoCalcul: Prime site for slide rules & calculating instruments from French makers GRAPHOPLEX, Lenoir, Tavernier-Gravet & others lesser known (history/dating/catalogues) |
| Greg Scott’s site | Greg's Slide Rules: handy site for a range of downloadable manuals |
| Herbert Schneemann & Walter Szrek’s (D) | Prime reference site for everything to do with calculating machines |
| Hubert van Dongen’s site | Prime archive site for maker: A.W. Faber/A.W. Faber-Castell |
| Hyperbolic Archive search | Bill Robinson's Hyperbolic Slide Rule Archive: a 2016 Rod Lovett developed search facility |
| Instrument Makers search | Webster Signature Database: compiled by Roderick S. & Marjorie K. Webster the DB is a repository for information about people who made & signed scientific instruments |
| ISRG search | International Slide Rule Group: online discussion forum of more than 1700 collectors for slide rules & associated mechanical calculating instruments |
| Jeffrey Donovan’s site (archived) | Prime reference site for everything to do with the Sikes Hydrometer (via Wayback Machine from 2014) |
| Jim Cerny’s list | Prime reference list for slide rules & slide charts for machining operations, often with the use of a lathe |
| Jim Cerny’s site | Prime reference site for everything to do with slide rule maker: Tehnolemn |
| John Oakhill’s site | Prime reference site for slide rule maker: Thornton/P.I.C. |
| Jorge Fabregas’ site (ES) | ZAZAA: Prime reference site (history/images/catalogues/manuals/patents/cursor evolution/etc) for maker A.W. Faber/A.W. Faber-Castell |
| Jörn Lütjens Online Museum | JOM: features an Abacus Museum, a Slide Rule Museum & a listing ARISTO electronic pocket calculators based on Jörn's collection |
| JOS literature search | OS Journal Literature Search: version of Rod Lovett's unmissable "Google-like" facility just for PDF versions of the JOS |
| José Carlos’ site (ES) | Prime reference site for slide rule maker: ARISTO |
| Kees Nagtegaal’s site | Mechanical Calculator: great site for non-electric mechanical calculating devices. |
| Kimura Satoru’s site (J) | Prime reference site for Japenese made slide rules |
| Klaus Kühn’s site (D) | COLLECTANEA de LOGARITHMIS: prime reference site for everything to do with Logarithms and their spiritual father: John Napier |
| KRING (NL) | Dutch Circle for Historical Calculating Instruments |
| Landesmuesum site (D) | TECHNOSEUM: Prime reference site for slide rule maker: NESTLER |
| Literature search | Slide Rule Literature Search : Rod Lovett's unmissable "Google-like" facility for locating literary sources/references |
| Long Scale search | Ed Chamberlain's Long Scale Slide Rule Archive: a 2016 Rod Lovett developed search facility with a smidgin of help from yours truly |
| Maker’s compendium | Handy “one-stop shopping” site with links to online information sources for some major slide rule makers - a 2017 Rod Lovett developed facility |
| Makers/brand search | Christian Hamann's handy potted history of many slide rule makers |
| Martin Brenner’s site | Prime reference site for everything to do with Pilot Balloon slide rules |
| Martin Šesték’s site (CZ) | Prime reference site for everything to do with slide rule maker: LOGAREX (also other Czechoslovakian makers) |
| Mike Konshak’s site | ISRM: International Slide Rule Museum - a superb information-rich site for everything and anything calculator orientated |
| Nathan Zeldes’ site | History of Computing: information packed site featuring many interesting slide rules & other historical computing artefacts |
| Net search | Net Search: Rod Lovett's unmissable "Google-like" facility for searching slide rule & calculating related websites |
| Nicola Marras site | Calcolatoria Educational Solutions: prime reference site for teaching aids & material to inspire the youth of today |
| NSN/NIIN search | National Stock Number/National Item Identification Number: the 9 or 13 digit numbers often found on slide rules commissioned by governmental MoD's, etc |
| Oak Ridge Associated Universities site | Prime reference site for everything to do with Radiation/Nuclear slide rules |
| OS | American Oughtred Society |
| Patent search | ESPACENET: worldwide search facility of the European Patent Office |
| Paul Ross’ site (dealer) | The Slide Rule Trading Co.: specialises in selling spare parts but importantly includes the most complete SUN HEMMI catalogue of models & a POST cross-reference table |
| Powerhouse Museum | MAAS: Museum of Applied Arts and Sciences in Australia has a varied on-line collection of well catalogued slide rules |
| Price & scarcity check | eBay Slide Rule Search: Rod Lovett's unmissable "Google-like" facility for checking the prices & scarcity of all completed slide rule auctions |
| Rarities Gallery OS | Rarities Gallery: a collection of images of rare items from the collections of slide rule and calculator enthusiasts hosted by the OS |
| Rarities Gallery UKSRC | Rarities Gallery: is a collection of images of rare items from the collections of slide rule and calculator enthusiasts hosted by the UKSRC |
| Rick Furr’s site | Prime reference site for everything to do with the Liechtenstein-made CURTA mechanical calculator |
| Rod Lovett’s site | Legendary site featuring Rod’s own collection (prime reference site for maker ARISTO) & Herman's Archive but also includes an essential set of search facilities & much more |
| Ron Manley’s site | Legendary multi-faceted site for all aspects of slide rule collecting |
| RST (D) | German Slide Rule Collectors group but their website doubles as an archive for many interesting articles, meeting reports, etc |
| Scale finder | ISRM's reference list (shown graphically) of 75 slide rule scales courtesy of Andrew Nikitin |
| Stephan Heimann’s site (D under construction) | Prime reference site for everything to do with Civil Engineering slide rules |
| Stephan Weiss’ site (D) | Prime reference site for the history of mechanical (instrumental) calculation with numbers |
| Steve Searle’s site (under development) | Steve's Slide Rules: impressive mixture of specialist models & books - particularly the handy is the grouping of specilaist models into trade or profession based categories |
| The National Museum of American History | Prime reference site for a wide-range & eclectic mix of mainly American slide rules |
| UK Design Reg. & Trade Marks search | The National Archives: "diamond/lozenge shaped" registration marks dating guide and catalogue of design registers/trade marks |
| UKSRC | UK Slide Rule Circle |
| University of Greifswald site (D) | Extensive collection of digital & analogue calculating instruments including many slide rules |
| Walter Shawlee II site (dealer) | SPHERE: The Slide Rule Universe - has a great archive alongside items for sale |
