Classification
200 - Religion
300 - Social sciences
900 - History & geography
320 - Political science
5
380 - Commerce, communications & transportation
4
100 - Philosophy & psychology
3
301 - Sociology & anthropology
2
576 - Genetics & evolution
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
330 - Economics
1
340 - Law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1
780 - Music
1