Classification
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362 - Social welfare problems & services
1
363 - Other social problems & services
5
364 - Criminology
1
370 - Education
19
371 - Schools & their activities; special education
3
378 - Higher education
2
379 - Public policy issues in education
1
380 - Commerce, communications & transportation
3
381 - Commerce
1
388 - Transportation; ground transportation
2
390 - Customs, etiquette & folklore
6
400 - Language
5
410 - Linguistics
11
500 - Natural sciences & mathematics
5
501 - Philosophy & theory
2
502 - Miscellany
1
509 - Historical, geographic & persons treatment
2
510 - Mathematics
10
512 - Algebra
1
515 - Analysis
5
516 - Geometry
6
518 - Numerical analysis
1
519 - Probabilities & applied mathematics
13
520 - Astronomy & allied sciences
1
530 - Physics
18
531 - Classical mechanics; solid mechanics
2
537 - Electricity & electronics
1
539 - Modern physics
1
540 - Chemistry & allied sciences
1
541 - Physical chemistry
4
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
2
560 - Paleontology; paleozoology
1
570 - Life sciences; biology
5
571 - Physiology & related subjects
1
572 - Biochemistry
1
576 - Genetics & evolution
1
577 - Ecology
4
580 - Plants (Botany)
2
582 - Plants noted for characteristics & flowers
1
590 - Animals (Zoology)
1
600 - Technology
5
610 - Medicine & health
21
612 - Human physiology
1
613 - Personal health & safety
3
614 - Incidence & prevention of disease
4
615 - Pharmacology & therapeutics
3
616 - Diseases
27
617 - Surgery & related medical specialties
12
618 - Gynecology, obstetrics, pediatrics & geriatrics
5
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