Classification
320 - Political science
576 - Genetics & evolution
610 - Medicine & health
330 - Economics
4
363 - Other social problems & services
4
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
100 - Philosophy & psychology
2
581 - Specific topics in natural history
2
658 - General management
2
900 - History & geography
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
551 - Geology, hydrology & meteorology
1