List of Dewey Decimal classes

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The Dewey Decimal Classification (DDC) is structured around ten main classes covering the entire world of knowledge; each main class is further structured into ten hierarchical divisions, each having ten divisions of increasing specificity. [1] As a system of library classification the DDC is "arranged by discipline, not subject", so a topic like clothing is classed based on its disciplinary treatment (psychological influence of clothing at 155.95, customs associated with clothing at 391, and fashion design of clothing at 746.92) within the conceptual framework. [2] The list below presents the ten main classes, hundred divisions, and thousand sections. [3]


Class 000 – Computer science, information and general works

Class 100 – Philosophy and psychology

Class 200 – Religion

Class 300 – Social sciences

Class 400 – Language

Class 500 – Science

Class 600 – Technology

Class 700 – Arts and recreation

Class 800 – Literature

Class 900 – History and geography

See also

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  1. DDC Frequently Asked Questions
  2. Introduction to the Dewey Decimal Classification (23rd edition)
  3. Summary lists of Dewey Decimal Classification, 23rd edition (2011)
  4. "000 Computer science, information, general works" (PDF). OCLC. Retrieved 2022-01-08.
  5. "EPC 143-S74.1 Graphic design and communication design". OCLC. Retrieved 2023-01-29.