Classification
320 - Political science
60
100 - Philosophy & psychology
33
300 - Social sciences
26
900 - History & geography
20
340 - Law
16
330 - Economics
9
170 - Ethics
5
200 - Religion
5
700 - The arts; fine & decorative arts
5
301 - Sociology & anthropology
4
304 - Factors affecting social behavior
4
370 - Education
4
576 - Genetics & evolution
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
551 - Geology, hydrology & meteorology
2
600 - Technology
2
800 - Literature & rhetoric
2
920 - Biography, genealogy & insignia
2
297 - Islam, Babism & Bahai Faith
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
530 - Physics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1