Classification
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520 - Astronomy & allied sciences
2
523 - Specific celestial bodies & phenomena
3
526 - Mathematical geography
1
530 - Physics
160
531 - Classical mechanics; solid mechanics
7
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
534 - Sound & related vibrations
13
535 - Light & infrared & ultraviolet phenomena
13
536 - Heat
17
537 - Electricity & electronics
14
538 - Magnetism
7
539 - Modern physics
25
540 - Chemistry & allied sciences
32
541 - Physical chemistry
70
542 - Techniques, equipment & materials
1
543 - Analytical chemistry
66
546 - Inorganic chemistry
6
547 - Organic chemistry
22
548 - Crystallography
5
549 - Mineralogy
1
550 - Earth sciences
6
551 - Geology, hydrology & meteorology
19
560 - Paleontology; paleozoology
1
570 - Life sciences; biology
112
571 - Physiology & related subjects
658
572 - Biochemistry
325
573 - Specific physiological systems in animals
10
574 - [Unassigned]
1
576 - Genetics & evolution
19
577 - Ecology
39
578 - Natural history of organisms
2
579 - Microorganisms, fungi & algae
32
580 - Plants (Botany)
38
581 - Specific topics in natural history
11
582 - Plants noted for characteristics & flowers
2
590 - Animals (Zoology)
19
591 - Specific topics in natural history
1
592 - Invertebrates
6
599 - Mammals
3
600 - Technology
51
610 - Medicine & health
281
611 - Human anatomy, cytology & histology
18
612 - Human physiology
146
613 - Personal health & safety
11
614 - Incidence & prevention of disease
7
615 - Pharmacology & therapeutics
68
616 - Diseases
244
617 - Surgery & related medical specialties
48
618 - Gynecology, obstetrics, pediatrics & geriatrics
13
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