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Welcome! This database-driven web site presents 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.
-Mike Syphers
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The Oughtred Society 09 January 2022 International Slide Rule Museum