The International Slide Rule Group  Join this worldwide forum - free, honest advice. the Oughtred Society (OS) Based in the United States but has international membership Dutch Circle of Slide Rule Collectors (KRING) Multi-lingual Site of our Dutch Counter-Parts Rechenschieber-Brief (RST) - German RST Collector Group United Kingdom Slide Rule Circle (UKSRC) - the web site of the British Slide Rule Collectors. The Slide Rule Trading Group  Join this Yahoo Group - Good place to sell/barter/trade ARC Friends of Slide Rules of Calculation Spanish Speaking Forum Group

ISRG MEMBERS

• Slide Rule Museum Mike Konshak Collection- Physically Located at Computer History Museum Mountainview, CA (USA)
• Photo Calcula - Jorge Gonzalo Collection - France (French and Spanish)
• Historie rekenlinialen en rekenschijven, historie of slide rules - A.M. (Dries) Molen Collection - Netherlands (Dutch and Spanish)
• Slide Rule Zone - GuiSheng Xu Collection, Shanghai, China (English and Chinese)
• French & European Slides Rules and Planimeters - Daniel Toussaint Collection (French)
• Mathematical Instruments - David Riches's Collection (UK)
• Slide Rule Annex - Atshushi Tomozawa's Collection (Japan)
• Keisanjyaku - Kimura Satoru Collection (Japan)
• Bob's Slide Rule Site - Robert Adams's Collection (Australia)
• The Slide Rules Giovanni Pastore Collection - English (Italy)
• Dave's Slide Rules! Dave Van Domelen Collection
• Dave Crate's Quality Slide Rules Dave Crate's Collection
• K&E Catalog Collection of Clark McCoy
• Russian_Slide Rules Sergei Frolov Collection (Russia)
• Slide Rules & Mechanical Calculators Images from my collection. (Italy).
• Slide Rule Ron Manley's Site, Collection, Past Prices, Resources.
• Slide Rules Cal Clifford Collection
• Peter Holland's Slide Rules (Germany)
• Prof.Dr.-Ing.C.-M.Hamann Collection (Germany)
• Slide Rule Guy's Home Page Jay Francis Collection
• Eric's Slide Rule Site Eric's Marcotte's Collection and Resource (Canada)
• Otis King's Patent Calculator Run by Dick Lyon (USA)
• Ron Manley's Slide Rule Site Ron Manley Collection (UK)
• Slide Rules and Calculators Chris Gillings Collection
• Greg's Slide Rules Greg Scott Collection (Australia)
• John Wolff's Web Museum Mechanical Calculating Devices (Australia)
• Reglas de Calculo Guillermo Castarés (Argentina)
• Slide Rules Kent Walker Collection
• Rod Lovett's Slide Rules Rod Lovett Collection and Resources
• Slide Rules Todd Tolhurs Collection.
• Slide Rule Universe Walter Shawlee  a.k.a. Sphere Research Corp. (Canada)
• Tehnolemn Timisoara Slide Rule Archive - Jim Cerny and Bob Adams Romanian slide rules.
• My Slide Rules Jason Waskiewicz Collection and resource.
• Museum of Pocket Calculating Devices Gerhard Wenzel Collection (Netherlands)
• Chris Osburn's Calculating Instruments
• Slide Rule Page John Current Collection
• Collection Peter Owen (UK)
• Slide Rule Trade Offer by Charles C. Benton
• The Famous SlideRule Page Harry Teicher's Favorites
• Slide rules in Thailand Pairin's Collection, some for sale (Thailand).
• Kung's Personal Slide Rules Kung Collection (Singapore)
• Slide Rules from German Manufacturers Michael Gährken (Germany)
• Random Pictures of Slide Rules Tom Bullock Collection
• Slide Rule On-Line Museum the collection of  Dr. Joern Luetjens (Germany)
• Vom_Kerbholz_zur_Curta Von Jan Myer's  History of Calculators (Germany)
• Calculating Machines John Wolf's Web Museum (Australia)
• Davis Brothers Slide Rule Magazine A few interesting articles, Davis Collection.
• La mia collezione di regoli calcolatori Scarpaz Collection (Italy) [Italian/English]
• Logarlécek Albuma János Budai Collection (Hungarian Picture archive - Very slow)
• List of Slide Rules Nigel Bromley Collection (UK)
• Adam's Slide Rules Adam Coleman Collection - Small, but conservative (US)
• MACHINES A CALCULER MÉCANIQUES Christophe Mery Collection (French/English)
• Gizmology Bill Jones Collection and Home Brew Slide Rules
• REGOLI CALCOLATORI E ALTRI STRUMENTI Ezio Raddi Collection (Italy)
• Slide Rule Collection Giovanni Breda (Italy)
• A Collectors Family Stephan Georgi Collection (Germany)

Commercial Seller's, Traders, Antique Dealers.

• eBay - Search for slide rule, sliderule, slide ruler, slide rules, etc. 's current listing of slide rule auctions. 
• Concise Slide Rules On-Line Shop - The only existing manufacturer left, shipping circulars from Japan.
• Sphere Research Slide Rule Universe Marketplace - Walter's place. Good variety, shipping from Canada.
• Rose Vintage Instruments - Tag what you are interested in and Dick sends back a price list .
• The Gemmary's Slide Rules - Prices but no pictures.
• Calculator Museum - Hans Bloemen sells slide rules to pay for led calculators (Netherlands).
• David Crate's Quality Slide Rules - David Crate, complete mint sets to "gently-used slide rule classics"!
• Slide Rule Trading Co. - Paul Ross sells slide rules and repair parts, cases, books and ephemera with emphasis on Hemmi and Frederick Post products.
• Gilai Collectibles - Calculating and Scientific Instruments.
• Indian Creek Antiques & Collectables - Slide rules, calculators and books.
• Antiques of Science and Technology - Rare Finds, Big $$ - Jim and Rhoda's
• D'Antiques - Mechanical Calculating Devices, Slide Rules and Books for sale
• Patented Antiques - Antiques of a Mechanical Nature Larry and Carol Meeker - Wide variety
• MATERIALE DISPONIBILE - Regoli Calcolatori - Umberto Cordier - Slide rules for sale(Italy)

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