Classification
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371 - Schools & their activities; special education
1
374 - Adult education
149
380 - Commerce, communications & transportation
502
381 - Commerce
63
384 - Communications; telecommunication
931
387 - Water, air & space transportation
2
388 - Transportation; ground transportation
1
398 - Folklore
2
400 - Language
67
410 - Linguistics
26
414 - Phonology & phonetics
104
417 - Dialectology & historical linguistics
1
500 - Natural sciences & mathematics
2,501
502 - Miscellany
7
507 - Education, research & related topics
1
510 - Mathematics
158
511 - General principles of mathematics
2
515 - Analysis
4
518 - Numerical analysis
4
519 - Probabilities & applied mathematics
43
520 - Astronomy & allied sciences
2
526 - Mathematical geography
5
529 - Chronology
1
530 - Physics
244
531 - Classical mechanics; solid mechanics
4
532 - Fluid mechanics; liquid mechanics
8
534 - Sound & related vibrations
1
535 - Light & infrared & ultraviolet phenomena
1
537 - Electricity & electronics
7
538 - Magnetism
1
539 - Modern physics
1
540 - Chemistry & allied sciences
270
541 - Physical chemistry
23
542 - Techniques, equipment & materials
1
543 - Analytical chemistry
3
547 - Organic chemistry
39
548 - Crystallography
1
549 - Mineralogy
1
550 - Earth sciences
11
551 - Geology, hydrology & meteorology
166
570 - Life sciences; biology
3
572 - Biochemistry
3
573 - Specific physiological systems in animals
1
576 - Genetics & evolution
200
577 - Ecology
2
578 - Natural history of organisms
1
580 - Plants (Botany)
338
581 - Specific topics in natural history
88
589 - [Unassigned]
1
590 - Animals (Zoology)
12
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