Dewey Decimal Classification
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The Dewey Decimal Classification (DDC) is a numerical classification system used in many library catalogs (see article in Wikipedia). The classification is not a free resource, but copyrighted by OCLC since 1988.
Resources[edit]
- About Dewey Decimal Classification (DDC) (by OCLC)
- An overview on the first three levels is available in Wikipedia (= DDC 22 Summaries)
- DDC 22 Summaries can be downloaded and used via OCLC ResearchWorks after accepting the terms and conditions (T&C), see http://www.oclc.org/research/researchworks/ddc/terms.htm
- Further DDC services (e.g. print copy, access to WebDewey) need to be licensed. The pricing can be found at: http://www.oclc.org/support/forms/pdf/dfwpro.pdf