A Classification and Subject Index for Cataloguing
By Melvil Dewey, 1876. In plain text (two versions), HTML, or as a zip file, from Project Gutenberg.
About Dewey
Provides overview of the invention of the first ontology notation system and the biography of the inventor.
Detailed Universal (Dewey) Decimal System
Includes Tree of Life Sefirot names for the Dewey numbers.
Dewey Browse
Contains websites using the Dewey Decimal Classification System. It is meant to be used for K-12 research and for personal interests.
Dewey Decimal System Home Page
Official homepage for DDC. Includes: news, DDC updates, listing of libraries using DDC and internet resources classified by DDC, products and research. DDC summaries available to third level. Download Dewey screensaver.
Dewey Decimal System of Classification
An outline of the Dewey Decimal System, broken down into its ten major divisions, and one thousand subdivisions.
Do the Dewey!
A Javascript trivia game testing one's knowledge of the Dewey Decimal Classification scheme.
NLC Dewey Decimal Classification policy
For Canadian libraries that use the Dewey Decimal system, the National Library of Canada tells how the NLC makes it easier to find Canadian authors and Canadian history, and how they make books for kids 15 and under stand out.