Dewey Decimal System (by tens)
000 Generalities
010 Bibliography
020 Library & information science
030 General encyclopedias
040 Not used
050 General serial publications
060 Organizations
070 Journalism, publishing, media
080 General collections
090 Manuscripts & rare books
100 Philosophy & Pscyhology
110 Metaphysics
120 Epistemology, causation, humankind
130 Paranormal phenomenon
140 Specific philosophical schools
150 Psychology
160 Logic
170 Ethics
180 Ancient, medieval, Oriental philosophy
190 Modern western philosophy
200 Religion
210 Philosophy & theory of religion
220 Bible
230 Christianity
240 Christian moral & devotional theology
250 Christian orders & local church
260 Social & ecclesiastical theology
270 History of Christianity & Christian sects
280 Christian denominations
290 Comparative religion & other religions
300 Social Sciences
310 Statistics
320 Political science
330 Economics
340 Law
350 Public administration & military science
360 Social programs & services
370 Education
380 Commerce
390 Customs, etiquette, folklore
400 Language
410 Linguisitics
420 English & Old English
430 Germanic
440 French
450 Italian, Romanian, Rhaeto-Romanic
460 Spanish & Portuguese
470 Latin
480 Greek
490 Other languages
500 Natural Sciences & Math
510 Math
520 Astronomy
530 Physics
540 Chemistry
550 Earth sciences
560 Paleontology
570 Life sciences
580 Plants
590 Animals
600 Technology & Applied Sciences
610 Medicine
620 Engineering
630 Agriculture
640 Home economics (cooking)
650 Management
660 Chemical engineering
670 Manufacturing
680 Manufacture for specific uses
690 Building
700 Arts, Sports, Recreation
710 Civic & landscape art
720 Architecture
730 Plastic arts (sculpture)
740 Drawing & decorative art
750 Painting
760 Graphic arts
770 Photography
780 Music
790 Recreation, performing arts, sports
800 Literature & Rhetoric
810 American 
820 English & Old English
830 Germanic
840 French
850 Italian, Romanian
860 Spanish, Portuguese
870 Latin
880 Greek
890 Other literatures
900 Geography, History, Biography
910 Geography, travel
920 Biography, genealogy, insignia
930 Ancient world
940 Europe
950 Asia
960 Africa
970 North America
980 South America
990 Other areas