Dewey Decimal Classification

010 Bibliography
020 Library science
030 General encyclopedias
040 General collected essays
050 General periodicals
060 General organizations
070 Newspapers and journalism
080 Collected works
090 Manuscripts and rare books

100 Philosophy

110 Metaphysics
120 Metaphysical theories
130 Branches of psychology
140 Philosophical systems
150 Psychology
160 Logic
170 Ethics
180 Ancient, medieval, Oriental
190 Modern western philosophy

200 Religion

210 Natural religion
220 Bible
230 Doctrinal theology
240 Moral and devotional
250 Pastoral theology
260 Christian church
270 Christian church history
280 Christian churches and sects
290 Other religions

300 Social Sciences

310 Statistics
320 Political science
330 Economics
340 Law
350 Public administration
360 Social welfare
370 Education
380 Commerce
390 Customs and folklore

410 Comparative linguistics
420 English and Anglo-Saxon
430 Germanic languages
440 French, Provencal, Catalan
450 Italian, Romanian
460 Spanish, Portuguese
470 Latin and other Italic
480 Classical and modern Greek
490 Other language

500 Pure Science

510 Mathematics
520 Astronomy
530 Physics
540 Chemistry
550 Earth sciences
560 Paleontology
570 Anthropology and biology
580 Botanical sciences
590 Zoological sciences

600 technology

610 Medical sciences
620 Engineering
630 Agriculture
640 Home economics
650 Business
660 Chemical technology
670 Manufactures
680 Assembled products
690 Buildings

700 The Arts

710 Civic and landscape art
720 Architecture
730 Sculpture
740 Drawing and decorative arts
750 Painting
760 Graphic arts
770 Photography
780 Music
790 Recreation

810 American literature
820 English and Anglo-Saxon
830 Germanic literatures
840 French, Provencal, Catalan
850 Italian, Romanian
860  Spanish, Portuguese
870 Latin and other Italic
880 Classical and modern Greek
890 Other literatures

900 History

910 Geography and history
920 Biography
930 Ancient history
940 Europe
950 Asia
960 Africa
970 North America
980 South America
990 Rest of world

970 in detail:

970 North America
971 Canada
972 Middle America
973 United States
974 Northeastern states
975 Southeastern states
976 South-central states
977 North-central states
978 Western states
979 Great basin and Pacific Slope

973 in detail:

973.1 Discovery and exploration to 1607
973.2 Colonial period, 1607-1775
973.3 Revolution and confederation, 1775-1789
973.4 Constitutional period, 1789-1809
973.5 Early 19th century, 1809-1845
973.6 Middle 19th century, 1845-1861
973.7 Civil War, 1861-1865
973.8 Later 19th century, 1865-1901
973.9 20th century, 1901-