| 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 |