Classification
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414 - Phonology & phonetics
8
417 - Dialectology & historical linguistics
1
430 - Germanic languages; German
1
480 - Hellenic languages; classical Greek
1
496 - African languages
1
499 - Austronesian & other languages
1
500 - Natural sciences & mathematics
50
501 - Philosophy & theory
8
507 - Education, research & related topics
1
509 - Historical, geographic & persons treatment
3
510 - Mathematics
4
511 - General principles of mathematics
1
512 - Algebra
2
515 - Analysis
3
516 - Geometry
1
519 - Probabilities & applied mathematics
16
520 - Astronomy & allied sciences
26
523 - Specific celestial bodies & phenomena
3
526 - Mathematical geography
2
530 - Physics
21
531 - Classical mechanics; solid mechanics
2
534 - Sound & related vibrations
1
538 - Magnetism
3
539 - Modern physics
7
540 - Chemistry & allied sciences
27
541 - Physical chemistry
5
543 - Analytical chemistry
7
546 - Inorganic chemistry
2
547 - Organic chemistry
1
549 - Mineralogy
7
550 - Earth sciences
27
551 - Geology, hydrology & meteorology
74
553 - Economic geology
1
560 - Paleontology; paleozoology
35
567 - Fossil cold-blooded vertebrates; fossil fishes
1
569 - Fossil mammals
4
570 - Life sciences; biology
10
571 - Physiology & related subjects
4
572 - Biochemistry
1
576 - Genetics & evolution
47
577 - Ecology
19
578 - Natural history of organisms
4
579 - Microorganisms, fungi & algae
4
580 - Plants (Botany)
10
581 - Specific topics in natural history
20
582 - Plants noted for characteristics & flowers
1
590 - Animals (Zoology)
21
598 - Birds
1
599 - Mammals
8
600 - Technology
50
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