Classification
320 - Political science
708
300 - Social sciences
221
900 - History & geography
193
340 - Law
162
200 - Religion
120
100 - Philosophy & psychology
107
700 - The arts; fine & decorative arts
90
330 - Economics
80
304 - Factors affecting social behavior
36
297 - Islam, Babism & Bahai Faith
27
370 - Education
25
140 - Specific philosophical schools
23
610 - Medicine & health
20
301 - Sociology & anthropology
14
576 - Genetics & evolution
14
400 - Language
13
333 - Economics of land & energy
11
363 - Other social problems & services
11
800 - Literature & rhetoric
11
170 - Ethics
10
600 - Technology
10
380 - Commerce, communications & transportation
9
000 - Computer science, information & general works
8
551 - Geology, hydrology & meteorology
8
361 - Social problems & social welfare in general
7
943 - Central Europe; Germany
6
327 - International relations
5
720 - Architecture
5
791 - Public performances
5
324 - The political process
4
336 - Public finance
4
410 - Linguistics
4
581 - Specific topics in natural history
4
305 - Social groups
3
360 - Social problems & services; associations
3
780 - Music
3
909 - World history
3
949 - Other parts of Europe
3
160 - Logic
2
302 - Social interaction
2
321 - Systems of governments & states
2
338 - Production
2
350 - Public administration & military science
2
364 - Criminology
2
630 - Agriculture & related technologies
2
658 - General management
2
782 - Vocal music
2
808 - Rhetoric & collections of literature
2
920 - Biography, genealogy & insignia
2
973 - United States
2
more ...