Classification
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381 - Commerce
4
382 - International commerce
5
390 - Customs, etiquette & folklore
2
394 - General customs
9
398 - Folklore
1
400 - Language
9
410 - Linguistics
12
414 - Phonology & phonetics
24
500 - Natural sciences & mathematics
67
502 - Miscellany
2
507 - Education, research & related topics
4
509 - Historical, geographic & persons treatment
4
510 - Mathematics
11
512 - Algebra
2
515 - Analysis
2
519 - Probabilities & applied mathematics
4
520 - Astronomy & allied sciences
11
530 - Physics
33
531 - Classical mechanics; solid mechanics
4
535 - Light & infrared & ultraviolet phenomena
1
536 - Heat
1
537 - Electricity & electronics
1
539 - Modern physics
2
540 - Chemistry & allied sciences
848
541 - Physical chemistry
38
542 - Techniques, equipment & materials
1
543 - Analytical chemistry
89
546 - Inorganic chemistry
29
547 - Organic chemistry
52
549 - Mineralogy
1
550 - Earth sciences
4
551 - Geology, hydrology & meteorology
101
570 - Life sciences; biology
88
571 - Physiology & related subjects
40
572 - Biochemistry
109
573 - Specific physiological systems in animals
2
574 - [Unassigned]
2
576 - Genetics & evolution
108
577 - Ecology
58
578 - Natural history of organisms
1
579 - Microorganisms, fungi & algae
59
580 - Plants (Botany)
264
581 - Specific topics in natural history
75
590 - Animals (Zoology)
8
591 - Specific topics in natural history
1
592 - Invertebrates
2
595 - Arthropods
1
597 - Cold-blooded vertebrates; fishes
1
599 - Mammals
1
600 - Technology
346
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