Main Categories List
- 500 Natural sciences & mathematics
- 501 Philosophy & theory
- 502 Miscellany
- 503 Dictionaries & encyclopedias
- 504 Not assigned or no longer used
- 505 Serial publications
- 506 Organizations & management
- 507 Education, research, related topics
- 508 [Natural history]?
- 509 Historical, areas, persons treatment
- 510 Mathematics
- 511 General principles
- 512 Algebra & number theory
- 513 Arithmetic?
- 514 Topology
- 515 Analysis
- 516 Geometry
- 517
- 518
- 519 Probabilities & applied mathematics
- 520 Astronomy & allied sciences
- 521 [Celestial mechanics]?
- 522 Techniques, equipment, materials
- 523 Specific celestial bodies & phenomena
- 524
- 525 Earth (Astronomical geography)
- 526 Mathematical geography
- 527 [Celestial navigation]?
- 528 Ephemerides?
- 529 Chronology?
- 530 Physics
- 531 Classical mechanics [Solid mechanics]?
- 532 Fluid mechanics [Liquid mechanics]?
- 533 [Gas mechanics]?
- 534 Sound & related vibrations
- 535 Light & paraphotic phenomena
- 536 Heat
- 537 Electricity & electronics
- 538 Magnetism
- 539 [Modern physics]?
- 540 Chemistry & allied sciences
- 541 Physical chemistry & theoretical chemistry
- 542 Techniques, equipment, materials
- 543 Analytical chemistry
- 544 [Qualitative analysis]?
- 545 [Quantitative analysis]?
- 546 Inorganic chemistry
- 547 Organic chemistry
- 548 Crystallography?
- 549 Mineralogy
- 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
- 560 Paleontology Paleozoology?
- 561 Paleobotany?
- 562 Fossil invertebrates
- 563 Fossil primitive phyla
- 564 Fossil Mollusca & Molluscoidea?
- 565 Other fossil invertebrates
- 566 Fossil Vertebrata? (Fossil Craniata?)
- 567 Fossil cold-blooded vertebrate?s
- 568 FossilAves (Fossil birds)
- 569 Fossil Mammalia
- 570 [Life science]?s
- 571
- 572 Human races
- 573 Physical anthropology
- 574 Biology
- 575 Evolution & genetics
- 576 Microbiology
- 577 General nature of life
- 578 [Microscopy in biology]?
- 579 Collection and preservation
- 580 [Botanical sciences]?
- 581 Botany
- 582 Spermatophyta? (Seed-bearing plants)
- 583 Dicotyledones?
- 584 Monocotyledones?
- 585 Gymnospermae? (Pinophyta?)
- 586 Cryptogamia? ([Seedless plants]?)
- 587 Pteridophyta? ([Vascular cryptograms]?)
- 588 Bryophyta?
- 589 Thallobionta? & Prokaryotae
- 590 Zoological sciences
- 591 Zoology
- 592 Invertebrates?
- 593 Protozoa, Echinodermata?, related phyla
- 594 Mollusca & Molluscoidea?
- 595 Other invertebrates
- 596 Vertebrata? (Craniata?, Vertebrates?)
- 597 [Cold-blooded vertebrates]? Fishes
- 598 Aves (Birds)
- 599 Mammalia (Mammals)
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Dewey Decimal System/Natural sciences and mathematics