Classification
616 - Diseases
1,499
571 - Physiology & related subjects
1,411
572 - Biochemistry
1,032
610 - Medicine & health
388
580 - Plants (Botany)
351
579 - Microorganisms, fungi & algae
340
615 - Pharmacology & therapeutics
296
570 - Life sciences; biology
295
612 - Human physiology
278
660 - Chemical engineering
193
611 - Human anatomy, cytology & histology
167
576 - Genetics & evolution
120
540 - Chemistry & allied sciences
114
599 - Mammals
112
620 - Engineering & allied operations
90
614 - Incidence & prevention of disease
80
617 - Surgery & related medical specialties
79
630 - Agriculture & related technologies
75
581 - Specific topics in natural history
71
001 - Knowledge
43
300 - Social sciences
43
547 - Organic chemistry
43
543 - Analytical chemistry
40
600 - Technology
40
000 - Computer science, information & general works
36
590 - Animals (Zoology)
33
333 - Economics of land & energy
31
006 - Special computer methods
29
577 - Ecology
29
004 - Data processing & computer science
27
631 - Techniques, equipment & materials
27
618 - Gynecology, obstetrics, pediatrics & geriatrics
25
541 - Physical chemistry
23
519 - Probabilities & applied mathematics
22
500 - Natural sciences & mathematics
20
613 - Personal health & safety
18
664 - Food technology
18
005 - Computer programming, programs & data
17
363 - Other social problems & services
17
530 - Physics
16
700 - The arts; fine & decorative arts
16
621 - Applied physics
12
641 - Food & drink
12
140 - Specific philosophical schools
11
573 - Specific physiological systems in animals
9
634 - Orchards, fruits & forestry
9
501 - Philosophy & theory
8
518 - Numerical analysis
8
900 - History & geography
8
170 - Ethics
7
more ...