Collection Photos Rule Makers Special Groupings Vignettes
Logarithm Review Slide Rule Basics Slide Rule Scales References

Welcome! This database-driven web site provides information regarding a personal collection of slide rules, as well as other useful information about slide rules in general, their operation and use. Click the “right arrow” > on this web page or hit the right arrow key on the keyboard to go to the next page. Or, use the left navigation pane to go directly to a particular chapter or subject.

The site was last updated on 05 March 2021. Visit Most Recent Additions to see the newest slide rules added to the collection.
-Mike Syphers
About This Web Site About the Author
The Oughtred Society International Slide Rule Museum