Classification
320 - Political science
2,794
330 - Economics
2,794
300 - Social sciences
564
900 - History & geography
251
630 - Agriculture & related technologies
231
340 - Law
225
700 - The arts; fine & decorative arts
52
200 - Religion
27
170 - Ethics
26
500 - Natural sciences & mathematics
22
370 - Education
18
600 - Technology
13
576 - Genetics & evolution
12
610 - Medicine & health
11
100 - Philosophy & psychology
7
800 - Literature & rhetoric
6
160 - Logic
5
140 - Specific philosophical schools
4
332 - Financial economics
3
336 - Public finance
3
720 - Architecture
3
380 - Commerce, communications & transportation
2
400 - Language
2
920 - Biography, genealogy & insignia
2
296 - Judaism
1
333 - Economics of land & energy
1
450 - Italian, Romanian & related languages
1
520 - Astronomy & allied sciences
1
603 - Dictionaries & encyclopedias
1
622 - Mining & related operations
1
650 - Management & auxiliary services
1
657 - Accounting
1
917 - Geography of & travel in North America
1