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The Dewey Decimal System

The Dewey Decimal Classification System, invented by Melvil Dewey in 1873, is used to organize books and other nonfiction materials in the library.

000 - Computer science, information & general works	010 - Bibliographies 020 - Library and information sciences 030 - Encyclopedias & books of facts 040 - Unassigned 050 - Magazines, journals & serials 060 - Associations, organizations & museums 070 - News media, journalism & publishing 080 - Quotations 090 - Manuscripts & rare books
100 - Philosophy & psychology	110 - Metaphysics 120 - Epistemology 130 - Parapsychology & occultism 140 - Philosophical schools of thought 150 - Psychology 160 - Logic 170 - Ethics 180 - Ancient, medieval & eastern philosophy 190 - Modern western philosophy
200 - Religion	210 - Philsophy & theory of religion 220 - The Bible 230 - Christianity & Christian theology 240 - Christian practice & observance 250 - Christian pastoral practice & religious orders 260 - Christian 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 lanugages 490 - Other Languages
500 - Science	510 - Mathematics 520 - Astronomy 530 - Physics 540 - Chemistry 550 - Earth sciences & geology 560 - Fossils & prehistoric life 570 - Life sciences; biology 580 - Planta (Botany) 590 - Animals (Zoology)
600 - Technology	610 - Medicine & health 620 - Engineering 630 - Agriculture 640 - Home & family management 650 - Management & public relations 660 - Chemical engineering 670 - Manufacturing 680 - Manufacture for specific uses 690 - Building & construction
700 - Arts & Recreation	710 - Landscaping & area planning 720 - Architecture 730 - Sculpture, ceramics & metalwork 740 - Drawing & decorative arts 750 - Painting 760 - Graphic arts 770 - Photography & computer art 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 & geography	910 - Geography & travel 920 - Biography & genealogy 930 - History of ancient world (to ca. 499) 940 - History of Europe 950 - History of Asia 960 - History of Africa 970 - History of North America 980 - History of South America 990 - History of other areas