Classification
610 - Medicine & health
580 - Plants (Botany)
109
630 - Agriculture & related technologies
76
000 - Computer science, information & general works
63
600 - Technology
59
700 - The arts; fine & decorative arts
57
620 - Engineering & allied operations
51
363 - Other social problems & services
47
333 - Economics of land & energy
39
330 - Economics
21
380 - Commerce, communications & transportation
21
581 - Specific topics in natural history
21
551 - Geology, hydrology & meteorology
20
576 - Genetics & evolution
19
900 - History & geography
14
140 - Specific philosophical schools
13
540 - Chemistry & allied sciences
13
658 - General management
11
500 - Natural sciences & mathematics
10
414 - Phonology & phonetics
9
800 - Literature & rhetoric
8
720 - Architecture
7
340 - Law
6
300 - Social sciences
5
320 - Political science
5
304 - Factors affecting social behavior
4
612 - Human physiology
4
170 - Ethics
3
100 - Philosophy & psychology
2
370 - Education
2
410 - Linguistics
2
530 - Physics
2
306 - Culture & institutions
1
362 - Social welfare problems & services
1
615 - Pharmacology & therapeutics
1