500s

500 Natural Sciences and Mathemetics

  • 501 Philosophy & theory
  • 502 Miscellany
  • 503 Dictionaries & encyclopedias
  • 504 [Unassigned]
  • 505 Serial publications
  • 506 Organizations & management
  • 507 Education, research & related topics
  • 508 Natural history
  • 509 Historical, geographic & persons treatment

510 Mathematics

  • 511 General principles of mathematics
  • 512 Algebra
  • 513 Arithmetic
  • 514 Topology
  • 515 Analysis
  • 516 Geometry
  • 517 [Unassigned]
  • 518 Numerical analysis
  • 519 Probabilities & applied mathematics

520 Astronomy & allied sciences

  • 521 Celestial mechanics
  • 522 Techniques, equipment & materials
  • 523 Specific celestial bodies & phenomena
  • 524 [Unassigned]
  • 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 & infrared & ultraviolet phenomena
  • 536 Heat
  • 537 Electricity & electronics
  • 538 Magnetism
  • 539 Modern physics

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 550 Earth sciences

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; fossil microorganisms
  • 562 Fossil invertebrates
  • 563 Fossil marine & seashore invertebrates
  • 564 Fossil mollusks & molluscoids
  • 565 Fossil arthropods
  • 566 Fossil chordates
  • 567 Fossil cold-blooded vertebrates; fossil fishes
  • 568 Fossil birds
  • 569 Fossil mammals

570 Life sciences; biology

  • 571 Physiology & related subjects
  • 572 Biochemistry
  • 573 Specific physiological systems in animals
  • 574 [Unassigned]
  • 575 Specific parts of & systems in plants
  • 576 Genetics & evolution
  • 577 Ecology
  • 578 Natural history of organisms
  • 579 Microorganisms, fungi & algae

580 Plants (Botany)

  • 581 Specific topics in natural history
  • 582 Plants noted for characteristics & flowers
  • 583 Dicotyledons
  • 584 Monocotyledons
  • 585 Gymnosperms; conifers
  • 586 Seedless plants
  • 587 Vascular seedless plants
  • 588 Bryophytes
  • 589 [Unassigned]

590 Animals (Zoology)

  • 591 Specific topics in natural history
  • 592 Invertebrates
  • 593 Marine & seashore invertebrates
  • 594 Mollusks & molluscoids
  • 595 Arthropods
  • 596 Chordates
  • 597 Cold-blooded vertebrates; fishes
  • 598 Birds
  • 599 Mammals

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