Library Research Skills
How Dewey Works
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Dewey numbers divide humanity's knowledge, ideas, and artistic creations into ten major categories spanning a range from 000 to 999: |
000 Generalities 100 Philosophy & psychology 200 Religion 300 Social sciences 400 Language 500 Natural sciences & math 600 Technology (Applied sciences) 700 The arts 800 Literature & rhetoric 900 Geography & history
520 Astronomy 521 Celestial mechanics 522 Techniques, equipment, etc. 523 Specific celestial bodies 524 [Unassigned] 525 Earth (Astronomical geography) 526 Mathematical geography 527 Celestial navigation 528 Ephemerides 529 Chronology |
500 Natural science & mathematics 510 Mathematics 520 Astronomy & allied sciences 530 Physics 540 Chemistry & allied sciences 550 Earth sciences 560 Paleontology & paleozoology 570 Life sciences 580 Botanical sciences 590 Zoological sciences
523.3 Moon 523.4 Planets 523.5 Meteors, solar wind, zodiacal light 523.6 Comets 523.7 Sun |
Each sub-category is further divided into nine specialized topics ranging from 1 to 9:
Each major category divides into nine sub-categories spanning a range of 10 to 90. For example:
By adding decimals, the specialized topics are broken down even further:
Adapted from original page created by Steve Cramer, Duke University Libraries.
Guide to Library Research. Last Update: Tuesday, 27-Nov-2001 09:35:28 EST
available at http://www.lib.duke.edu/libguide/fi_books_dd.htm
