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Dewey Decimal Classification (DDC)

Dewey Decimal Classification (DDC). A library classification developed by Melvil Dewey in 1876 DDC are numbers representing subjects. Ten main classes – 100 divisions – 1000 sections Abridged 14 (Dewey Decimal Classification, 14 th ed.) ISBN 0910608733. Ten classes.

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Dewey Decimal Classification (DDC)

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  1. Dewey Decimal Classification (DDC) • A library classification developed by Melvil Dewey in 1876 • DDC are numbers representing subjects. • Ten main classes – 100 divisions – 1000 sections • Abridged 14 (Dewey Decimal Classification, 14th ed.) ISBN 0910608733 sttai/DDC 14

  2. Ten classes • 000 – Computer science, information & general works • 100 – Philosophy & psychology • 200 – Religion • 300 – Social sciences • 400 – Language • 500 – Science (including mathematics) • 600 – Technology and applied Science • 700 – Arts and recreation • 800 – Literature • 900 – History & geography sttai/DDC 14

  3. Example • DDC number for seismography - 551.220 28 • 551 (base number) – Geology, hydrology, meteorology • 551.22 (subdivision) – Earthquakes • 028 (Table 1, standard subdivision) – Auxiliary techniques and procedure sttai/DDC 14

  4. Tables • Table 1 – Standard division • Table 2 – Geographic areas, and Persons • Table 3 – Subdivisions for individual literatures, for specific literary forms • Numbers from these may be added to base number to describe the subject content of the book sttai/DDC 14

  5. Table 1 • Person -092 • Management -068 • History and descriptions with respect to kinds of persons -08 • Dictionaries, encyclopedias, concordances -03 • Historical treatment (not limited by area or time) -09 sttai/DDC 14

  6. Table 2 • Not to be used alone unless noted otherwise • Often used together with Table 1 • E.g. • -2 Persons • -4 Europe, western Europe • -5 Asia • 796.352095 1 Golf in China sttai/DDC 14

  7. Table 3 • Also not to be used alone unless otherwise stated under individual literatures in 810-890 • -1 Poetry e.g. 821 English Poetry • -2 Drama • -3 Fiction • Most libraries classified fiction by the author’s last name • E.g. • “Point Blanc” by Anthony Horowitz • F HOR sttai/DDC 14

  8. Useful links • Dewey at Online Computer Library Center (OCLC) – order print or web dewey • http://www.oclc.org/dewey/ • British Library online catalogue • http://catalogue.bl.uk • Library of Congress online catalogue • http://catalog.loc.gov/ sttai/DDC 14

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