Classification
301 - Sociology & anthropology
140 - Specific philosophical schools
3
300 - Social sciences
3
320 - Political science
3
700 - The arts; fine & decorative arts
3
170 - Ethics
2
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
200 - Religion
1
304 - Factors affecting social behavior
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography
1