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Dewey Decimal Classification (DDC) : 540

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)

540 : Chemistry & allied sciences
541 : Physical chemistry
542 : Techniques, equipment & materials
543 : Analytical chemistry
544 : [Unassigned]
545 : [Unassigned]
546 : Inorganic chemistry
547 : Organic chemistry
548 : Crystallography
549 : Mineralogy