Classification
333 - Economics of land & energy
11
320 - Political science
8
330 - Economics
5
363 - Other social problems & services
5
900 - History & geography
4
304 - Factors affecting social behavior
3
610 - Medicine & health
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
300 - Social sciences
2
370 - Education
2
380 - Commerce, communications & transportation
2
600 - Technology
2
630 - Agriculture & related technologies
2
720 - Architecture
2
000 - Computer science, information & general works
1
301 - Sociology & anthropology
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
657 - Accounting
1
658 - General management
1