Classification
610 - Medicine & health
330 - Economics
25
320 - Political science
23
300 - Social sciences
10
630 - Agriculture & related technologies
10
140 - Specific philosophical schools
7
361 - Social problems & social welfare in general
6
900 - History & geography
5
100 - Philosophy & psychology
4
170 - Ethics
4
600 - Technology
4
301 - Sociology & anthropology
3
363 - Other social problems & services
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
576 - Genetics & evolution
2
590 - Animals (Zoology)
2
615 - Pharmacology & therapeutics
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
200 - Religion
1
306 - Culture & institutions
1
340 - Law
1
370 - Education
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
612 - Human physiology
1