Classification
320 - Political science
330 - Economics
900 - History & geography
2,195
340 - Law
1,535
300 - Social sciences
1,361
576 - Genetics & evolution
943
630 - Agriculture & related technologies
316
700 - The arts; fine & decorative arts
170
200 - Religion
74
100 - Philosophy & psychology
64
370 - Education
63
610 - Medicine & health
58
333 - Economics of land & energy
55
170 - Ethics
47
304 - Factors affecting social behavior
28
600 - Technology
28
363 - Other social problems & services
25
500 - Natural sciences & mathematics
24
800 - Literature & rhetoric
24
160 - Logic
20
380 - Commerce, communications & transportation
13
400 - Language
12
140 - Specific philosophical schools
9
720 - Architecture
8
336 - Public finance
6
780 - Music
6
530 - Physics
5
520 - Astronomy & allied sciences
2
258 - [Unassigned]
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
325 - International migration & colonization
1
335 - Socialism & related systems
1
337 - International economics
1
550 - Earth sciences
1
553 - Economic geology
1
913 - Geography of & travel in ancient world
1
920 - Biography, genealogy & insignia
1
944 - France & Monaco
1
972 - Middle America; Mexico
1