This is a comparison chart showing how the Dewey Decimal and Library of Congress Classification systems organize resources by concept, in part for the purpose of assigning . These two systems account for over 95% of the classification in United States libraries, and are used widely worldwide. The chart includes all ninety-nine second level (two-digit) DDC classes (040 is not assigned), and should include all second level (two-digit) LCC classes.

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  • This is a comparison chart showing how the Dewey Decimal and Library of Congress Classification systems organize resources by concept, in part for the purpose of assigning . These two systems account for over 95% of the classification in United States libraries, and are used widely worldwide. The chart includes all ninety-nine second level (two-digit) DDC classes (040 is not assigned), and should include all second level (two-digit) LCC classes. Where a class in one system maps to several classes in other system, it will be listed multiple times (e.g. DDC class 551). Additional information on these classification plans is available at: Dewey Decimal Classification -- high level categories, with links to lower level categories Library of Congress Classification -- high level categories
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  • This is a comparison chart showing how the Dewey Decimal and Library of Congress Classification systems organize resources by concept, in part for the purpose of assigning . These two systems account for over 95% of the classification in United States libraries, and are used widely worldwide. The chart includes all ninety-nine second level (two-digit) DDC classes (040 is not assigned), and should include all second level (two-digit) LCC classes.
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  • Comparison of Dewey and Library of Congress subject classification
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