The Dewey Decimal System

The Dewey Decimal Classification System is the most widely used library classification system in the world. In the United States, most high school and some college and university libraries use it to organize their collections. By searching your online library catalog for specific subject headings, you can identify sources that are relevant to your research writing project. You can learn more about the Dewey Decimal System at http://www.oclc.org/dewey/about/about_the_ddc.htm. You can view the complete classification system at http://www.oclc.org/dewey/about/ddc_21_summaries.htm.

000	Computers, Internet & Systems 
010	Bibliographies
020	Library & information science
030	Encyclopedias & books of facts 
040	Unassigned
050	Magazines, journals & serials 
060	Associations, organizations & museums 
070	Journalism, publishing & news media 
080	Quotations
090	Manuscripts & rare books


100	Philosophy 
110	Metaphysics
120	Epistemology 
130	Astrology, parapsychology & the occult 
140	Philosophical schools of thought 
150	Psychology
160	Logic
170	Ethics 
180	Ancient, medieval & Eastern philosophy
190	Modern western philosophy

200	Religion
210	Philosophy & theory of religion
220	The Bible
230	Christianity & Christian theology
240	Christian practice & observance 
250	Christian pastoral practice & religious orders 
260	Church organization, social work & worship 
270	History of Christianity 
280	Christian denominations 
290	Other religions

300	Social Sciences, Sociology & Anthropology 
310	Statistics
320	Political science
330	Economics
340	Law
350	Public administration & military science
360	Social problems & social services 
370	Education
380	Commerce, communications & transportation
390	Customs, etiquette & folklore


400	Language
410	Linguistics
420	English & Old English Languages
430	German & related languages 
440	French & related languages 
450	Italian, Romanian & related languages 
460	Spanish & Portuguese languages
470	Latin & Italic languages 
480	Classical & modern Greek languages 
490	Other languages

500	Science
510	Mathematics
520	Astronomy 
530	Physics
540	Chemistry 
550	Earth sciences & geology 
560	Fossils & prehistoric life 
570	Biology & life sciences 
580	Plants (Botany)
590	Animals (Zoology)

600	Technology 

610	Medicine
620	Engineering 
630	Agriculture 
640	Home & family management
650	Management & public relations
660	Chemical engineering
670	Manufacturing
680	Manufacturing specific products
690	Building & construction 

700	Arts
710	Landscaping & area planning 
720	Architecture
730	Sculpture, ceramics & metalwork 
740	Drawing & decorative arts
750	Painting 
760	Graphic arts 
770	Photography 
780	Music
790	Sports, games & entertainment 

800	Literature, Rhetoric & Criticism 
810	American literature in English
820	English & Old English literatures
830	German & related literatures 
840	French & related literatures 
850	Italian, Romanian & related literatures 
860	Spanish & Portuguese literatures
870	Latin & Italic literatures 
880	Classical & modern Greek literatures 
890	Other literatures 


900	History
910	Geography & travel
920	Biography & genealogy 
930	History of the ancient world (to ca. 499 A.D.)
940	History of Europe (ca. 500 A.D.- )
950	History of Asia 
960	History of Africa
970	History of North America
980	History of South America
990	History of other regions

Bedford/St. Martin's

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