Classification
100 - Philosophy & psychology
170 - Ethics
320 - Political science
340 - Law
900 - History & geography
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
330 - Economics
1
370 - Education
1
600 - Technology
1