- 000 Computers, Information & General Reference
- 010 Bibliographies & catalogs
020 Library & information sciences
030 General encyclopedic works
040 [Unassigned]
050 General serials & their indexes
060 General organizations & museums
070 News media, journalism, publishing
080 General collections
090 Manuscripts & rare books
- 100 Philosophy & Psycology
- 110 Metaphysics
120 Epistemology, causation, humankind
130 Paranormal phenomena
140 Specific philosophical schools
150 Psychology
160 Logic
170 Ethics (Moral philosophy)
180 Ancient, medieval, Oriental philosophy
190 Modern Western philosophy
- 200 Religion
- 210 Natural theology
220 Bible
230 Christian Theology
240 Christian moral & devotional theology
250 Christian orders & local churches
260 Christian social theology
270 Christian church history
280 Christian denominations & sects
290 Other and comparative religions
- 300 Social Sciences
- 310 General statistics
320 Political science
330 Economics
340 Law
350 Public administration
360 Social services; associations
370 Education
380 Commerce, communications, transport
390 Customs, etiquette, folklore
- 400 Language
- 410 Linguistics
420 English & Old English
430 Germanic languages, i.e., German
440 Romance languages, i.e., French
450 Italian, Romanian, Rhaeto-Romanic languages
460 Spanish & Portuguese languages
470 Italic languages, i.e., Latin
480 Hellenic languages, i.e., Classical Greek
490 Other languages
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