| Site | Description |
|---|---|
| John Current | Archive of John Current's Collection |
| Chris Gillings | A list of pictures and rules in his collection including many special purpose rules |
| Eric Marcotte | A resource centre together with a selection of his rules |
| Chris Sangwin | A resource centre |
| Todd Tolhurst | A selection of his rules |
| Ron Manley | Probably the largest non-commercial resource centre on the net |
| Slide Rule Universe | A very impressive commercial site with a continually growing slide rule archive |
| Dave Crate's Quality Used Slide Rules | Archive of Dave Crate's site |
| Peter Holland | A German trader and collector dealing mainly in Aristo, Nestler and Faber-Castell |
| Abacus | An Abacus resource centre |
| David Thompson | New Faber Castell and Nestler's for sale |
| The Gemmary | A dealer in rules and antiques |
| The Slide Rule Trading Group | For buyers and sellers of rules |
| The International Slide Rule Group | A treasure house of information |
| The Oughtred Society | The International Society for all Slide Rule Collectors |
| Ing. Giovanni Pastore | History and collection of slide rules |
| Peter Owen | A personal collection with some slide rule literature |
| University of Greifswald | A German site containing pictures of a range of linear,circular and cylindrical rules |
| Nederland Kring | A Dutch resource centre |
| Steve Burton | A Slide Rule Simulator |
| Keuffel and Esser | Keuffel and Esser Resource Centre |
| Circle of German slide rule collectors | Site of the German slide rule collectors |
| Philip Scholl's Slide Rule Site | Archive of Philip's slide rule site |
| Dick Rose | A site containing a large number of vintage instruments (including many slide rules) for sale. |
| Greg's Slide Rules | A personal collection of slide rules from an Australian collector and a resource centre. |
| Slide Rule Store | A range of rules, books, and manuals for sale |
| Dick Lyon's Otis King Site | An Otis King resource centre |
| The United Kingdom Slide Rule Circle | To promote interest in slide rules |
| Atsushi Tomozawa | A Japanese collector's site |
| Slide Rule Zone | A Chinese collector's site |
| "Mr Klingon" | For Klingons,trekkies and slide rule emulation |
| Robert Munafo's Slide Rules | An unusual page, well worth exploring |
| Giovanni Breda's Slide Rules | An Italian Collector's Slide Rules |
| Mike Konshak's Slide Rule Museum | A wide ranging resource centre |
| Calculators at Gilai collectibles | A collection of slide rules and calculating equipments |
| William John's Slide Rules | Archive of William John's Collection |
| Markus' Sectors | A selection of Sector photographs |
| José Carlos' Slide Rules | A collection with significant Aristo content |
| Andrew Nitikin | A Resource Centre |
| Slide Rule Documentation | A selection of manuals for printing |
| Nathan Zeldes | An exhibition of slide rules and other historical computing artifacts |
| Rod Lovett's Slide Rules | A collection of slide rules showing the rule maker's art in the 20'th Century |
| "German Resource Centre" | Starting point for a wide range of pictures, literature, manuals, simulators etc. |
| Jorn's Online Museum | A German museum for abacii and slide rules |
| The University of Utah | What Can You Do With a Slide Rule? |
| Hemmi Rules | A small collection of pictures |
| Chris Osburn's Calculating Instruments | A personal collection and a question: Is a "calculating instrument" an "insidious device"? |
| David M Riches | A collection of mathematical instruments and slide rules |
| Jfzazza's Site | A Spanish collector's site |
| History of Technology Websites | Includes sections on the Halden Calculex, and John Dicas proof rule |
| John Lahr's Slide Rule Collection | An inventory of his slide rules |
| linealis.org | A collection of French and European slide rules , particularly Graphoplex. |
| Tom Bullock's Slide Rules | A random collection of slide rules |
| Dave van Domelen | A collection of his slide rules |
| Andreas Tabak | A German collector's slide rules |
| Hubert | A collection of Faber Castell slide rules |
| The Curta Calculator Site | Everything you need to know about the Curta |
| Kim's Collection | A Japanese collector's web site |
| Stefan Vorkoetter's Site | A collection of Slide Rules, Early Calculators, and Old Computers |
| Slide Rule Wristwatches | A history of slide rule wristwatches |
| Bill Robinson's Site | A collection of articles and list of hyperbolic rules |
| Cold War Calculators | For defence planners and military commanders |
| Chris Hamann's Slide Rule Collection ... | in "The On-Line Museum" = Collection + Restoration Mechanical Calculators, SlideRules + More |
| Bob Adams Site | Contains an Elektro Slide Rule Database |
| Gonzalo Martin's site 'photocalcul' Slide Rules | A collection of slide rules , mechanical calculators and more ( French Language ) |
| Marks Armbrust's Collection | Includes a Virtual Hemmi 153 |
| John Oakhill | A Thornton site |
| Kent Walker | Archive of Kent Walker's Collection |
| Martin Brenner | Pilot Balloon Resources |
| History of Computing | A site created by Nathan Zeldes |
| Instrumentos de Calculo - Coleccion Castares | Photos and information of slide rules and calculators in the collection |
| Nicola Marras's Site | A collection of slide rules of an Italian collector |
| Walter Szrek and Herbert Schneemann' Site | An extensive site on calculating machines |
| Bryan Purcell's Site | Information about Slide Rules, Math, Science, Astronomy, and Education |
| Oak Ridge Associated Universities | A collection of Nuclear slide rules |
| David A Davis | A Richoh/Relay Archive Site. Courtesy of the WayBack Machine |
| Roberto Durrer's Slide Rules | Site brasileiro para colecionadores de réguas de cálculo |
| Tina's Slide Rules | Demonstrating a wide range of interests. |