Classification
100 - Philosophy & psychology
300 - Social sciences
320 - Political science
6
301 - Sociology & anthropology
5
333 - Economics of land & energy
4
900 - History & geography
4
140 - Specific philosophical schools
3
200 - Religion
3
370 - Education
3
610 - Medicine & health
3
170 - Ethics
2
600 - Technology
2
120 - Epistemology, causation & humankind
1
296 - Judaism
1
340 - Law
1
364 - Criminology
1
581 - Specific topics in natural history
1
800 - Literature & rhetoric
1