Classification
320 - Political science
330 - Economics
304
340 - Law
89
900 - History & geography
30
300 - Social sciences
9
576 - Genetics & evolution
6
700 - The arts; fine & decorative arts
6
363 - Other social problems & services
5
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
580 - Plants (Botany)
2
600 - Technology
2
160 - Logic
1
304 - Factors affecting social behavior
1
332 - Financial economics
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
658 - General management
1
780 - Music
1