Dewey Decimal System
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The Dewey Decimal System continues to be the most dominant classification system, used in over 138 countries and 200,000 libraries.
Contents
Utility
Main Classes
Each of the 10 below main categories has 10 secondary categories within which there are another 10 subcategories.
▪ 000 – Computer science, information & general works
▪ 100 – Philosophy and psychology
▪ 200 – Religion
▪ 300 – Social sciences
▪ 400 – Language
▪ 500 – Science (including mathematics)
▪ 600 – Technology/Applied Science
▪ 700 – Arts and recreation
▪ 800 – Literature
▪ 900 – History, geography, and biography
Melville Dewey
December 10, 1851 – December 26, 1931
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Failed Alternatives
Current Issues
Contemporary Substitutes
Seattle Public Library