Dewey Decimal System
The Dewey Decimal System is a hierarchical system of classification that utilizes decimals to codify divisions. Despite its decreasing popularity, Dewey continues to be the most dominant classification system in the world and is 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
Revisions
Melville Dewey
December 10, 1851 – December 26, 1931
Alternatives
MARC AACR2 LC Subject Headigns Sears Subject Headings
Current Issues
Perry Branch Rebellion
Contemporary Substitutes
Metadata
Seattle Public Library