Classification
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401 - Philosophy & theory
1
414 - Phonology & phonetics
61
415 - Grammar
1
418 - Standard usage & applied linguistics
1
500 - Natural sciences & mathematics
65
501 - Philosophy & theory
13
502 - Miscellany
1
507 - Education, research & related topics
7
509 - Historical, geographic & persons treatment
7
510 - Mathematics
3
511 - General principles of mathematics
1
515 - Analysis
14
518 - Numerical analysis
8
519 - Probabilities & applied mathematics
49
520 - Astronomy & allied sciences
43
523 - Specific celestial bodies & phenomena
42
526 - Mathematical geography
65
530 - Physics
51
531 - Classical mechanics; solid mechanics
27
532 - Fluid mechanics; liquid mechanics
3
533 - Gas mechanics
3
534 - Sound & related vibrations
3
535 - Light & infrared & ultraviolet phenomena
2
536 - Heat
4
537 - Electricity & electronics
4
538 - Magnetism
5
539 - Modern physics
7
540 - Chemistry & allied sciences
53
541 - Physical chemistry
41
543 - Analytical chemistry
12
546 - Inorganic chemistry
11
547 - Organic chemistry
3
548 - Crystallography
8
549 - Mineralogy
138
550 - Earth sciences
422
551 - Geology, hydrology & meteorology
1,507
552 - Petrology
6
553 - Economic geology
63
554 - Earth sciences of Europe
1
559 - Earth sciences of other areas
3
560 - Paleontology; paleozoology
76
561 - Paleobotany; fossil microorganisms
2
570 - Life sciences; biology
34
571 - Physiology & related subjects
21
572 - Biochemistry
11
574 - [Unassigned]
3
576 - Genetics & evolution
68
577 - Ecology
213
578 - Natural history of organisms
22
579 - Microorganisms, fungi & algae
19
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