Classification
616 - Diseases
1,671
571 - Physiology & related subjects
302
610 - Medicine & health
251
570 - Life sciences; biology
238
617 - Surgery & related medical specialties
118
580 - Plants (Botany)
95
612 - Human physiology
78
630 - Agriculture & related technologies
66
579 - Microorganisms, fungi & algae
48
615 - Pharmacology & therapeutics
48
700 - The arts; fine & decorative arts
47
576 - Genetics & evolution
41
581 - Specific topics in natural history
40
333 - Economics of land & energy
28
363 - Other social problems & services
27
611 - Human anatomy, cytology & histology
27
618 - Gynecology, obstetrics, pediatrics & geriatrics
27
000 - Computer science, information & general works
25
614 - Incidence & prevention of disease
25
660 - Chemical engineering
24
572 - Biochemistry
22
600 - Technology
20
140 - Specific philosophical schools
19
592 - Invertebrates
19
500 - Natural sciences & mathematics
12
578 - Natural history of organisms
12
631 - Techniques, equipment & materials
12
380 - Commerce, communications & transportation
11
620 - Engineering & allied operations
11
340 - Law
10
540 - Chemistry & allied sciences
9
330 - Economics
8
370 - Education
8
900 - History & geography
8
577 - Ecology
7
658 - General management
7
820 - English & Old English literatures
7
100 - Philosophy & psychology
6
150 - Psychology
6
301 - Sociology & anthropology
6
634 - Orchards, fruits & forestry
6
320 - Political science
5
400 - Language
5
414 - Phonology & phonetics
5
006 - Special computer methods
4
155 - Differential & developmental psychology
4
158 - Applied psychology
4
543 - Analytical chemistry
4
551 - Geology, hydrology & meteorology
4
599 - Mammals
4
more ...