Classification
320 - Political science
240
330 - Economics
205
900 - History & geography
143
576 - Genetics & evolution
119
340 - Law
108
304 - Factors affecting social behavior
99
300 - Social sciences
44
610 - Medicine & health
40
140 - Specific philosophical schools
36
700 - The arts; fine & decorative arts
31
370 - Education
30
301 - Sociology & anthropology
24
200 - Religion
21
333 - Economics of land & energy
21
342 - Constitutional & administrative law
17
100 - Philosophy & psychology
16
325 - International migration & colonization
13
362 - Social welfare problems & services
12
341 - Law of nations
11
380 - Commerce, communications & transportation
11
600 - Technology
11
940 - History of Europe
9
170 - Ethics
8
820 - English & Old English literatures
8
361 - Social problems & social welfare in general
7
551 - Geology, hydrology & meteorology
7
297 - Islam, Babism & Bahai Faith
6
305 - Social groups
6
360 - Social problems & services; associations
6
363 - Other social problems & services
6
400 - Language
6
780 - Music
6
800 - Literature & rhetoric
6
000 - Computer science, information & general works
5
620 - Engineering & allied operations
5
371 - Schools & their activities; special education
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
720 - Architecture
3
280 - Christian denominations & sects
2
331 - Labor economics
2
581 - Specific topics in natural history
2
970 - History of North America
2
001 - Knowledge
1
150 - Psychology
1
153 - Mental processes & intelligence
1
284 - Protestants of Continental origin
1
296 - Judaism
1
302 - Social interaction
1
303 - Social processes
1
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