Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
2
300 - Social sciences
2
301 - Sociology & anthropology
320 - Political science
330 - Economics
340 - Law
2
370 - Education
2
600 - Technology
900 - History & geography
170 - Ethics
1
304 - Factors affecting social behavior
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1