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Dewey Decimal Classification (DDC) : 550

First Summary (The Ten Main Classes)

000 : Computers, information, & general works
100 : Philosophy & psychology
200 : Religion
300 : Social sciences
400 : Language
500 : Science
600 : Technology
700 : Arts & recreation
800 : Literature
900 : History & geography

Second Summary (The Hundred Divisions)

500 : Science
510 : Mathematics
520 : Astronomy
530 : Physics
540 : Chemistry
550 : Earth sciences & geology
560 : Fossils & prehistoric life
570 : Life sciences; biology
580 : Plants (Botany)
590 : Animals (Zoology)


Third Summary (The Thousand Sections)

550 : Earth sciences
551 : Geology, hydrology & meteorology
552 : Petrology
553 : Economic geology
554 : Earth sciences of Europe
555 : Earth sciences of Asia
556 : Earth sciences of Africa
557 : Earth sciences of North America
558 : Earth sciences of South America
559 : Earth sciences of other areas