Dewey Decimal System

How it Works
You can find a book at the library with the help of the Dewey Decimal System. This is the system most libraries use to organize the books on the shelves. A call number is assigned to each book based on its subject.

Nonfiction books are arranged in numeric order. Check the chart below to find the numbers for the general subject area you are looking for. Checking the number range on the end of the shelves will point you to the correct aisle to begin your search. The subject numbers listed here are the same in the Adult, Young Adult (YA), Children's, and Reference sections.

Fiction is shelved separately and is arranged by the author's last name. Biographies are shelved separately by the subject's last name.

Subjects
000-099 Encyclopedias, Computers, & General Information
  • 010 Bibliography
  • 020 Library Science
  • 030 General Encyclopedias
  • 040 General Collected Essays
  • 050 General Periodicals
  • 060 General Societies
  • 070 Newspaper Journalism
  • 080 Collected Works
  • 090 Manuscripts
100-199 Philosophy & Psychology
  • 110 Metaphysics
  • 120 Metaphysical Theories
  • 130 Branches of Psychology
  • 140 Philosophical Topics
  • 150 General Psychology
  • 160 Logic
  • 170 Ethics
  • 180 Ancient and Medieval
  • 190 Modern Philosophy
200-299 Religion & Mythology
  • 210 Natural Theology
  • 220 Bible
  • 230 Doctrinal Theology
  • 240 Devotional and Practical
  • 250 Pastoral Theology
  • 260 Christian Church
  • 270 Christian Church History
  • 280 Christian Churches and Sects
  • 290 Other Religions
300-399 Social Sciences, Politics, Law, & Education
  • 310 Statistics
  • 320 Political Science
  • 330 Economics
  • 340 Law
  • 350 Public Administration
  • 360 Social Welfare
  • 370 Education
  • 380 Public Services and Utilities
  • 390 Customs and Folklore
  • 398 Folk and Fairytales
400-499 Languages
  • 410 Comparative Linguistics
  • 420 English and Anglo-Saxon
  • 430 German Languages
  • 440 French, Provencal, Catalan
  • 450 Italian, Rumanian
  • 460 Spanish, Portuguese
  • 470 Latin and Other Italic
  • 480 Classical and Modern Greek
  • 490 Other Languages
500-599 Pure Sciences, Math, & Biology
  • 510 Mathematics
  • 520 Astronomy
  • 530 Physics
  • 540 Chemistry and Allied Sciences
  • 550 Earth Sciences
  • 560 Paleontology
  • 570 Anthropology
  • 580 Botanical Sciences
  • 590 Zoological
600-699 Technology, Medicine, Manufacturing, & Building
  • 610 Medical Sciences
  • 620 Engineering
  • 630 Agriculture
  • 640 Home Economics
  • 650 Business
  • 660 Chemical Technology
  • 670 Manufactures
  • 680 Other Manufactures
  • 690 Building Construction
700-799 The Arts, Recreation, & Entertainment
  • 710 Landscape and Civic Art
  • 720 Architecture
  • 730 Sculpture
  • 740 Drawing and Decorative Arts
  • 750 Painting
  • 760 Prints and Print-making
  • 770 Photography
  • 780 Music
  • 790 Recreation, Dance
800-899 Literature
  • 810 American Literature in English
  • 820 English and Old English
  • 830 Germanic literature
  • 840 French, Provencal, Catalan
  • 850 Italian, Rumanian
  • 860 Spanish, Portuguese
  • 870 Latin and Other Italic Literature
  • 880 Classical and Modern Greek
  • 890 Other Literature
900-999 Geography & History
  • 910 Geography, Travels, Description
  • 920 Biography, Group
  • 930 Ancient History
  • 940 Europe
  • 950 Asia
  • 960 Africa
  • 970 North America
  • 980 South America
  • 990 Other Parts of the World