Classification
616 - Diseases
820
571 - Physiology & related subjects
221
576 - Genetics & evolution
143
579 - Microorganisms, fungi & algae
141
500 - Natural sciences & mathematics
92
610 - Medicine & health
56
615 - Pharmacology & therapeutics
54
572 - Biochemistry
48
570 - Life sciences; biology
25
660 - Chemical engineering
22
580 - Plants (Botany)
18
620 - Engineering & allied operations
12
636 - Animal husbandry
12
590 - Animals (Zoology)
11
613 - Personal health & safety
10
664 - Food technology
10
577 - Ecology
9
614 - Incidence & prevention of disease
9
641 - Food & drink
9
363 - Other social problems & services
8
617 - Surgery & related medical specialties
7
333 - Economics of land & energy
6
581 - Specific topics in natural history
6
140 - Specific philosophical schools
5
600 - Technology
4
612 - Human physiology
4
618 - Gynecology, obstetrics, pediatrics & geriatrics
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
380 - Commerce, communications & transportation
3
543 - Analytical chemistry
3
547 - Organic chemistry
2
631 - Techniques, equipment & materials
2
000 - Computer science, information & general works
1
004 - Data processing & computer science
1
100 - Philosophy & psychology
1
170 - Ethics
1
320 - Political science
1
551 - Geology, hydrology & meteorology
1
592 - Invertebrates
1
621 - Applied physics
1
628 - Sanitary & municipal engineering
1
634 - Orchards, fruits & forestry
1