Classification
571 - Physiology & related subjects
1,842
616 - Diseases
612
572 - Biochemistry
370
610 - Medicine & health
224
612 - Human physiology
203
579 - Microorganisms, fungi & algae
99
580 - Plants (Botany)
96
615 - Pharmacology & therapeutics
80
570 - Life sciences; biology
74
660 - Chemical engineering
63
590 - Animals (Zoology)
53
611 - Human anatomy, cytology & histology
53
614 - Incidence & prevention of disease
47
630 - Agriculture & related technologies
37
617 - Surgery & related medical specialties
22
620 - Engineering & allied operations
22
576 - Genetics & evolution
20
547 - Organic chemistry
18
599 - Mammals
17
577 - Ecology
15
618 - Gynecology, obstetrics, pediatrics & geriatrics
15
530 - Physics
13
543 - Analytical chemistry
11
581 - Specific topics in natural history
11
301 - Sociology & anthropology
6
500 - Natural sciences & mathematics
5
546 - Inorganic chemistry
5
613 - Personal health & safety
5
621 - Applied physics
5
004 - Data processing & computer science
4
573 - Specific physiological systems in animals
4
003 - Systems
3
333 - Economics of land & energy
3
541 - Physical chemistry
3
551 - Geology, hydrology & meteorology
3
591 - Specific topics in natural history
3
363 - Other social problems & services
2
515 - Analysis
2
520 - Astronomy & allied sciences
2
560 - Paleontology; paleozoology
2
592 - Invertebrates
2
631 - Techniques, equipment & materials
2
636 - Animal husbandry
2
670 - Manufacturing
2
001 - Knowledge
1
006 - Special computer methods
1
140 - Specific philosophical schools
1
170 - Ethics
1
174 - Occupational ethics
1
300 - Social sciences
1
more ...