Classification
616 - Diseases
1,727
571 - Physiology & related subjects
920
610 - Medicine & health
453
570 - Life sciences; biology
385
615 - Pharmacology & therapeutics
121
579 - Microorganisms, fungi & algae
111
614 - Incidence & prevention of disease
75
612 - Human physiology
69
572 - Biochemistry
55
140 - Specific philosophical schools
33
700 - The arts; fine & decorative arts
32
580 - Plants (Botany)
30
617 - Surgery & related medical specialties
28
618 - Gynecology, obstetrics, pediatrics & geriatrics
24
333 - Economics of land & energy
20
363 - Other social problems & services
17
613 - Personal health & safety
16
620 - Engineering & allied operations
14
540 - Chemistry & allied sciences
13
660 - Chemical engineering
13
600 - Technology
10
611 - Human anatomy, cytology & histology
10
000 - Computer science, information & general works
9
576 - Genetics & evolution
9
006 - Special computer methods
8
330 - Economics
8
500 - Natural sciences & mathematics
8
380 - Commerce, communications & transportation
6
590 - Animals (Zoology)
6
664 - Food technology
6
304 - Factors affecting social behavior
5
577 - Ecology
5
599 - Mammals
5
547 - Organic chemistry
4
636 - Animal husbandry
4
641 - Food & drink
4
530 - Physics
3
574 - [Unassigned]
3
632 - Plant injuries, diseases & pests
3
900 - History & geography
3
003 - Systems
2
005 - Computer programming, programs & data
2
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
370 - Education
2
414 - Phonology & phonetics
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
057 - Serials in Slavic languages
1
061 - Organizations in North America
1
more ...