Classification
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533 - Gas mechanics
1
535 - Light & infrared & ultraviolet phenomena
10
536 - Heat
3
537 - Electricity & electronics
5
538 - Magnetism
3
539 - Modern physics
8
540 - Chemistry & allied sciences
3
541 - Physical chemistry
25
542 - Techniques, equipment & materials
3
543 - Analytical chemistry
8
546 - Inorganic chemistry
3
547 - Organic chemistry
19
548 - Crystallography
11
549 - Mineralogy
1
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
35
552 - Petrology
3
553 - Economic geology
1
559 - Earth sciences of other areas
1
570 - Life sciences; biology
7
571 - Physiology & related subjects
16
572 - Biochemistry
27
573 - Specific physiological systems in animals
4
574 - [Unassigned]
6
575 - Specific parts of & systems in plants
1
576 - Genetics & evolution
7
577 - Ecology
20
578 - Natural history of organisms
1
579 - Microorganisms, fungi & algae
2
581 - Specific topics in natural history
2
582 - Plants noted for characteristics & flowers
1
590 - Animals (Zoology)
1
591 - Specific topics in natural history
6
592 - Invertebrates
2
595 - Arthropods
6
597 - Cold-blooded vertebrates; fishes
4
598 - Birds
3
599 - Mammals
7
604 - Special topics
1
610 - Medicine & health
3
611 - Human anatomy, cytology & histology
7
612 - Human physiology
38
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
615 - Pharmacology & therapeutics
4
616 - Diseases
32
617 - Surgery & related medical specialties
3
618 - Gynecology, obstetrics, pediatrics & geriatrics
4
620 - Engineering & allied operations
42
621 - Applied physics
31
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