Classification
900 - History & geography
81
320 - Political science
64
330 - Economics
48
340 - Law
48
780 - Music
39
800 - Literature & rhetoric
29
300 - Social sciences
28
781 - General principles & musical forms
18
700 - The arts; fine & decorative arts
17
200 - Religion
15
305 - Social groups
15
338 - Production
15
658 - General management
14
304 - Factors affecting social behavior
13
370 - Education
13
140 - Specific philosophical schools
12
782 - Vocal music
12
100 - Philosophy & psychology
11
301 - Sociology & anthropology
11
363 - Other social problems & services
11
355 - Military science
10
332 - Financial economics
9
973 - United States
9
170 - Ethics
8
327 - International relations
8
331 - Labor economics
8
333 - Economics of land & energy
8
380 - Commerce, communications & transportation
8
576 - Genetics & evolution
8
820 - English & Old English literatures
8
324 - The political process
7
346 - Private law
7
600 - Technology
7
813 - American fiction in English
7
302 - Social interaction
6
306 - Culture & institutions
5
342 - Constitutional & administrative law
5
500 - Natural sciences & mathematics
5
610 - Medicine & health
5
000 - Computer science, information & general works
4
371 - Schools & their activities; special education
4
620 - Engineering & allied operations
4
788 - Wind instruments
4
791 - Public performances
4
810 - American literature in English
4
303 - Social processes
3
378 - Higher education
3
381 - Commerce
3
384 - Communications; telecommunication
3
398 - Folklore
3
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