Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
320 - Political science
5
900 - History & geography
4
340 - Law
3
170 - Ethics
2
300 - Social sciences
2
301 - Sociology & anthropology
2
363 - Other social problems & services
2
370 - Education
2
576 - Genetics & evolution
2
700 - The arts; fine & decorative arts
2
200 - Religion
1
330 - Economics
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
530 - Physics
1
581 - Specific topics in natural history
1