|An Abacus resource centre
|A German collector's slide rules
|A Resource Centre
|A Japanese collector's site
|Bill Robinson's Site
|A collection of articles and list of hyperbolic rules
|Bob Adams Site
|Contains an Elektro Slide Rule Database
|Bob's Calculators and Slide Rules
|Includes Thacher and Fuller Replicas
|Bryan Purcell's Site
|Information about Slide Rules, Math, Science, Astronomy, and Education
|Calculators at Gilai collectibles
|A collection of slide rules and calculating equipments
|A list of pictures and rules in his collection including many special purpose rules
|Chris Hamann's Slide Rule Collection ...
|in "The On-Line Museum" = Collection + Restoration Mechanical Calculators, SlideRules + More
|Chris Osburn's Calculating Instruments
|A personal collection and a question: Is a "calculating instrument" an "insidious device"?
|A resource centre
|Circle of German slide rule collectors
|Site of the German slide rule collectors
|A selection of High Bid/Most Watched/Ending Soon/Completed eBay Auctions
|Cold War Calculators
|For defence planners and military commanders
|Colin Tombeur's Site
|A small site with some interesting rules.
|Dave Crate's Quality Used Slide Rules
|Archive of Dave Crate's site.
|Dave Hoyer's Slide Rules
|An Australian Collector's Site. The World's Most Accurate Slide Rule!
|Dave van Domelen
|A collection of his slide rules
|David A Davis
|A Richoh/Relay Archive Site.
|David M Riches
|A collection of mathematical instruments and slide rules
|A Dutch collector's site
|David Walker's Web Site
|An interesting microscopic analysis of various slide rules
|An Otis King Resource Centre
|A site containing a large number of vintage instruments.
|A resource centre together with a selection of his rules
|German Resource Centre
|Starting point for a wide range of pictures, literature, manuals, simulators etc.
|Giovanni Breda's Slide Rules
|An Italian Collector's Slide Rules
|Gonzalo Martin's site 'photocalcul' Slide Rules
|A collection of slide rules , mechanical calculators and more ( French Language ). Archive Site.
|Greg's Slide Rules
|A personal collection of slide rules from an Australian collector and a resource centre.
|History of Computing
|A site created by Nathan Zeldes
|History of Technology Websites
|Includes sections on the Halden Calculex, and John Dicas proof rule
|A collection of Faber Castell slide rules
|Ing. Giovanni Pastore
|History and collection of slide rules
|Instrumentos de Calculo - Coleccion Castares
|Photos and information of slide rules and calculators in the collection. Archive Site.
|A Spanish collector's site
|Archive of John Current's Collection.
|John Lahr's Slide Rule Collection
|An inventory of his slide rules
|A Thornton site
|Jorn's Online Museum
|A German museum for abacii and slide rules
|Archive of Kent Walker's Collection
|Keuffel and Esser
|Keuffel and Esser Resource Centre
|A Japanese collector's web site
|A collection of French and European slide rules , particularly Graphoplex.
|Marks Armbrust's Collection
|Includes a Virtual Hemmi 153, K & E 4093-3, and Analon
|Pilot Balloon Resources
|Mike Konshak's Slide Rule Museum
|A wide ranging resource centre
|For Klingons,trekkies and slide rule emulation
|An exhibition of slide rules and other historical computing artifacts
|A Dutch resource centre
|Nicola Marras's Site
|A collection of slide rules of an Italian collector
|Oak Ridge Associated Universities
|A collection of Nuclear slide rules
|Paul Ross (Slide Rule Trading Co.)
|For Post and Hemmi afficionados; also spare parts for hemmi, k&e and relay/ricoh
|A German trader and collector dealing mainly in Aristo, Nestler and Faber-Castell
|A personal collection with some slide rule literature
|Philip Scholl's Slide Rule Site
|Archive of Philip's slide rule site.
|Robert Munafo's Slide Rules
|An unusual page, well worth exploring
|Roberto Durrer's Slide Rules
|Site brasileiro para colecionadores de réguas de cálculo
|Robert Wolf's Slide Rule Emulator
|Magnificent, highly professional software for creating slide rule emulators of any level of complexity.
|Rod Lovett's Slide Rules
|A collection of slide rules showing the rule maker's art in the 20'th Century
|A large resource centre
|Slide Rule Documentation
|Archive of a selection of manuals for printing.
|Slide Rule Operation
|Everything you need to know about the Operation of a Slide Rule
|Slide Rule Store
|A range of rules, books, and manuals for sale
|Slide Rule Universe
|A very impressive commercial site with a continually growing slide rule archive
|Soviet Digital Electronics Museum
|Stefan Vorkoetter's Site
|A collection of Slide Rules, Early Calculators, and Old Computers
|A Slide Rule Simulator
|The Curta Calculator Site
|Everything you need to know about the Curta
|A dealer in rules and antiques
|The International Slide Rule Group Archive
|A treasure house of information
|The Oughtred Society
|The International Society for all Slide Rule Collectors
|The Ultralog Project
|In memory of Zvi Doron
|The United Kingdom Slide Rule Circle
|To promote interest in slide rules
|The University of Utah
|What Can You Do With a Slide Rule?
|Tina's Slide Rules
|Demonstrating a wide range of interests.
|A selection of his rules
|Tom Bullock's Slide Rules
|A random collection of slide rules
|University of Greifswald
|Archive of a German site containing pictures of a range of linear,circular and cylindrical rules.
|Walter Szrek and Herbert Schneemann' Site
|An extensive site on calculating machines
|Wayne Harrison's Slide Rules
|Replica scales of long scale slide rules
|Archive of William John's Slide Rules
|Archive of William John's Collection.
|A personal collection of Curta mechanical calculators and electronic vintage calculating devices
|My personal collection of Curtas and electronic and mechanical calculators and computers
|Steve Seale's slide rule site
|A collection of mostly log-log, hyperbolic, and specialty rules
|The Slide Rule Guy's Web Site
|Selection of slide rules & antique mechanical calculators
|The National Museum of American History
|Details of a wide range of slide rules