Dewey Decimal System
Second Summary:  The 100 Divisions

000 Generalities
010 Bibliography
020 Library & Information Sciences
030 Genera; Encyclopedic Works
040
050 General Serial Publications
060 General Organizations & Museology
070 Journalism, Publishing, Newspapers
080 General Collections
090 Manuscripts & Book Rarities

500 Pure Sciences
510 Mathematics
520 Astronomy & Allied Sciences
530 Physics
540 Chemistry & Allied Sciences
550 Sciences of Earth & Other Worlds
560 Paleontology
570 Life Sciences
580 Botanical Sciences
590 Zoological Sciences

100 Philosophy & Related Disciplines
110 Metaphysics
120 Epistemology, Causation, Humankind
130 Paranormal Phenomena & Arts
140 Specific Philosophical Viewpoints
150 Psychology
160 Logic
170 Ethics (Moral Philosophy)
180 Ancient, Medieval, Oriental
190 Modern Western Philosophy

600 Technology (Applied Sciences)
610 Medical Sciences
620 Engineering & Allied Operations
630 Agriculture & Related Technologies
640 Home Economics & Family Living
650 Management & Auxiliary Services
660 Chemical & Related Technologies
670 Manufacturers
680 Manufacture for Specific Uses
690 Buildings

200 Religion
210 Natural Religion
220 Bible
230 Christian Theology
240 Christian Moral & Devotional
250 Local Church & Religious Orders
260 Social & Ecclesiastical Theology
270 History & Geography of Church
280 Christian Denominations & Sects
290 Other & Comparative Religions

700 The Arts
710 Civic & Landscape Art
720 Architecture
730 Plastic Arts Sculpture
740 Drawing, Decorative & Minor Arts
750 Painting & Paintings
760 Graphic Arts Prints
770 Photography & Photographs
780 Music
790 Recreational & Performing Arts

300 Social Sciences
310 Statistics
320 Political Science
330 Economics
340 Law
350 Public Administration
360 Social Problems and Services
370 Education
380 Commerce (Trade)
390 Customs, Etiquette, Folklore

800 Literature (Belles-lettres)
810 American Literatures in English
820 English & Anglo-Saxon Literatures
830 Literatures of Germanic Languages
840 Literatures of Romance Languages
850 Italian, Romanian, Rhaeto-Romanic
860 Spanish & Portuguese Literatures
870 Italic Literatures Latin
880 Hellenic Literatures Greek
890 Literatures of Other Languages

400 Language
410 Linguistics
420 English and Anglo-Saxon Languages
430 Germanic Languages German
440 Romance Languages French
450 Italian, Romanian, Rhaeto-Romanic
460 Spanish & Portuguese Languages
470 Italic Languages Latin
480 Hellenic Classical Greek
490 Other Languages

900 General Geography & History
910 General Geography Travel
920 General Biography & Genealogy
930 General History of the Ancient World
940 General History of Europe
950 General History of Asia
960 General History of Africa
970 General History of North America
980 General History of South America
990 General History of Other Areas