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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. The format is that of an online book. Click the arrows (> and <) on each page or use your keyboard’s arrow keys to move between pages. Use the left navigation pane to go directly to a particular chapter or subject.
-Mike Syphers
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The Oughtred Society 28 June 2022 International Slide Rule Museum