Guide to the Dewey Decimal System
| 000 | Generalities |
| 010 | Bibliographies |
| 020 | Library & Information Science |
| 030 | General Encyclopedias |
| 040 | (Not used) |
| 050 | General Periodicals |
| 060 | General Organizations & Museums |
| 070 | Journalism & Publishing |
| 080 | Collections |
| 090 | Manuscripts and Rare Books |
| 100 | Philosophy |
| 110 | Metaphysics |
| 120 | Epistemology |
| 130 | Paranormal Phenomena & Occult |
| 140 | Specific philosophies |
| 150 | Psychology |
| 160 | Logic |
| 170 | Ethics |
| 180 | Ancient, Medieval & Oriental Philosophy |
| 190 | Modern Western Philosophy |
| 200 | Religion |
| 210 | Natural Religion |
| 220 | Bible |
| 230 | Christian Theology |
| 240 | Christian Moral Theology |
| 250 | Local Church & Religious Orders |
| 260 | Social & Ecclesiastical Theology |
| 270 | History & Geography of Church |
| 280 | Christian Denominations & Sects |
| 290 | Non-Christian & Comparative Religion |
| 300 | Social Sciences |
| 310 | Statistics |
| 320 | Political Science |
| 330 | Economics |
| 340 | Law |
| 350 | Public Administration |
| 360 | Social Concerns & Services |
| 370 | Education |
| 380 | Trade & Commerce |
| 390 | Customs, Etiquette, Folklore |
| 400 | Languages |
| 410 | Linguistics |
| 420 | English Language |
| 430 | Germanic & Scandinavian Languages |
| 440 | French |
| 450 | Italian |
| 460 | Spanish & Portuguese |
| 470 | Latin |
| 480 | Classical Greek |
| 490 | Other Languages |
| 500 | Pure Sciences |
| 510 | Math |
| 520 | Astronomy |
| 530 | Physics |
| 540 | Chemistry |
| 550 | Earth Science |
| 560 | Paleontology |
| 570 | Life Sciences |
| 580 | Botany |
| 590 | Zoology |
| 600 | Applied Sciences & Technology |
| 610 | Medicine |
| 620 | Engineering |
| 630 | Agriculture |
| 640 | Home Economics |
| 650 | Management |
| 660 | Chemical Technologies |
| 670 | Manufacturing |
| 680 | Application-specific Manufacturing |
| 690 | Building |
| 700 | Arts |
| 710 | Civic & Landscape Art |
| 720 | Architecture |
| 730 | Sculpture |
| 740 | Drawing |
| 750 | Painting |
| 760 | Graphic & Printed Art |
| 770 | Photography |
| 780 | Music |
| 790 | Sports & Recreation |
| 800 | Literature |
| 810 | American Literature |
| 820 | English Literature |
| 830 | Germanic Literature |
| 840 | French Literature |
| 850 | Italian Literature |
| 860 | Spanish & Portuguese Literature |
| 870 | Latin Literature |
| 880 | Classical Greek Literature |
| 890 | Literature of Other Languages |
| 900 | History & Geography |
| 910 | Travel & Geography |
| 920 | Genealogy & Geography |
| 930 | Ancient History |
| 940 | European History |
| 950 | Asian History |
| 960 | African History |
| 970 | North American History |
| 980 | South American History |
| 990 | History of Other Areas |
