Classification
330 - Economics
79
900 - History & geography
75
320 - Political science
64
363 - Other social problems & services
35
700 - The arts; fine & decorative arts
32
340 - Law
31
333 - Economics of land & energy
30
000 - Computer science, information & general works
29
551 - Geology, hydrology & meteorology
22
610 - Medicine & health
21
380 - Commerce, communications & transportation
16
140 - Specific philosophical schools
12
630 - Agriculture & related technologies
11
338 - Production
10
301 - Sociology & anthropology
9
304 - Factors affecting social behavior
9
341 - Law of nations
9
370 - Education
8
400 - Language
8
910 - Geography & travel
8
300 - Social sciences
7
580 - Plants (Botany)
7
600 - Technology
7
800 - Literature & rhetoric
7
200 - Religion
6
414 - Phonology & phonetics
6
500 - Natural sciences & mathematics
6
620 - Engineering & allied operations
6
658 - General management
6
306 - Culture & institutions
5
350 - Public administration & military science
5
100 - Philosophy & psychology
4
327 - International relations
4
410 - Linguistics
4
576 - Genetics & evolution
4
820 - English & Old English literatures
4
909 - World history
4
303 - Social processes
3
323 - Civil & political rights
3
332 - Financial economics
3
540 - Chemistry & allied sciences
3
581 - Specific topics in natural history
3
590 - Animals (Zoology)
3
615 - Pharmacology & therapeutics
3
780 - Music
3
990 - History of other areas
3
297 - Islam, Babism & Bahai Faith
2
305 - Social groups
2
331 - Labor economics
2
337 - International economics
2
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