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Ten inch rules
The vast majority of the millions of slide rules made were of this size.
Due to the large number of rules in this category they are grouped by country of origin.

Country Notes
United Kingdom gb.gif (1306 bytes) Where slide rule production started.
Germany de.gif (910 bytes) Made some of the best quality rules.
United States of America us.gif (950 bytes) Produced a vast range of rules in terms of functionality and price.
Other countries un.gif (964 bytes) Includes slide rules from France, Japan and other countries.