Classification
571 - Physiology & related subjects
207
580 - Plants (Botany)
186
630 - Agriculture & related technologies
159
590 - Animals (Zoology)
155
577 - Ecology
146
610 - Medicine & health
138
616 - Diseases
125
333 - Economics of land & energy
107
576 - Genetics & evolution
100
572 - Biochemistry
98
592 - Invertebrates
97
570 - Life sciences; biology
92
581 - Specific topics in natural history
75
612 - Human physiology
70
000 - Computer science, information & general works
65
579 - Microorganisms, fungi & algae
65
363 - Other social problems & services
64
700 - The arts; fine & decorative arts
58
330 - Economics
57
500 - Natural sciences & mathematics
57
660 - Chemical engineering
55
620 - Engineering & allied operations
54
600 - Technology
49
006 - Special computer methods
48
634 - Orchards, fruits & forestry
45
300 - Social sciences
40
900 - History & geography
38
595 - Arthropods
34
615 - Pharmacology & therapeutics
31
001 - Knowledge
29
140 - Specific philosophical schools
29
632 - Plant injuries, diseases & pests
27
820 - English & Old English literatures
27
631 - Techniques, equipment & materials
25
910 - Geography & travel
24
551 - Geology, hydrology & meteorology
22
540 - Chemistry & allied sciences
20
380 - Commerce, communications & transportation
18
547 - Organic chemistry
18
591 - Specific topics in natural history
16
664 - Food technology
16
320 - Political science
15
621 - Applied physics
14
010 - Bibliography
13
304 - Factors affecting social behavior
12
550 - Earth sciences
12
578 - Natural history of organisms
12
641 - Food & drink
12
004 - Data processing & computer science
11
611 - Human anatomy, cytology & histology
11
more ...