Classification
140 - Specific philosophical schools
300 - Social sciences
330 - Economics
340 - Law
370 - Education
3
600 - Technology
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
320 - Political science
2
620 - Engineering & allied operations
2
900 - History & geography
2
170 - Ethics
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
400 - Language
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
700 - The arts; fine & decorative arts
1