Classification
100 - Philosophy & psychology
170 - Ethics
330 - Economics
900 - History & geography
320 - Political science
4
300 - Social sciences
3
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
340 - Law
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
370 - Education
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
658 - General management
1