| Abbreviation | Details |
|---|
| D.D. | David Davis - from his web site of the "Relay/Ricoh Archive" listing of slide rules. |
| clara.co | From Ron Manley's web site, "www.sliderules.clara.co.uk". |
| C.M. - Clark McCoy | From Clark's web site on K&E slide rules and catalogs; see also under MOL - Michael O'Leary and Clark McCoy- from email pictures Michael sent the Author on K&E and Pickett slide rules. |
| CLAY | Clay Castleberry has a different version of the Chinese Paper slide rule. |
| EJC | From Article by Edwin J. Chamberlain, PE, in JOS Volume 23, Number 1, Spring 2014, Page 52 |
| eBay | From pictures and listings of slide rules on eBay. |
| Fahey | John Fahey - from pictures he furnished to me on the Eckel Circular side rule. |
| HVH | Many of the listings were checked to Herman Van Herwijnen's listing of slide rules. (See "Lov" below). These many cross-checks are not listed. However, Herman's immense contibution to slide rule knowledge needs to be remembered. |
| Holland and D.v.J. | From Peter Holland and Dieter von Jezierski - email pictures, and copies of the translation of the manual by Dieter, of the Faber-Castell 989. |
| JOS | The Journal of the Oughtred Society, and JOS PLUS is on the OS web site. |
| J. R. G. | From information sent to me by Joäo Roberto Gabbardo on the Archimedes slide rule. |
| Lov | Rod's Slide Rules is Rod Lovett's web site in England. On this you will find Herman's Archive (See HVH above). |
| MOL | Michael O'Leary and Clark McCoy- from email pictures Michael sent the Author on K&E and Pickett slide rules; and from Clark's web site on K&E slide rules and catalogs. |
| P. Ross | Paul Ross - from his Article in Spring 2003, Journal of the Oughtred Society;"A Comprehensive Hemmi Slide Rule Catalog". |
| PMH | From Peter M. Hopp's, book, "SLIDE RULES Their History, Models, and Makers", Astragal Press, 1999. |
| PVM | From Pierre Vander Meulen's article on "Hyperbolic Functions on Slide Rules and Civil Engineering Applications", Autumn 2001 issue of the "Slide Rule GAZETTE" (UK); and, from email pictures and information he furnished. |
| R. K. | From emails sent to me by Ron Knapp. |
| R. H. | From information sent to me by Richard Smith Hughes about the slide rules in his collection. |
| R. S. | Rodger Shepherd - from articles he sent to me on the Blanc and Pletts slide rules. |
| S. T. | From scans and information sent to me by Steve Treadwell on the Lutz No. 300 B and the Ricoh No.159 |
| S. S. | Steve Seale - from pictures of the slide rule and information he sent to me |
| SPHERE | Sphere Research, "Slide Rule Universe"- from pictures on their web site. |
| WKR | From the Author's collection of slide rules. For corrections and additions to the listing email: wrobinson62@cox.net |
| WKRM | From the Author's collection of instruction manuals. |
| Xu Guisheng | From this Chinese collector's slide rule collection. |