Classification
100 - Philosophy & psychology
170 - Ethics
330 - Economics
340 - Law
320 - Political science
8
300 - Social sciences
4
140 - Specific philosophical schools
2
900 - History & geography
2
200 - Religion
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
600 - Technology
1
700 - The arts; fine & decorative arts
1