Classification
330 - Economics
320 - Political science
45
100 - Philosophy & psychology
39
300 - Social sciences
12
900 - History & geography
11
140 - Specific philosophical schools
6
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
6
200 - Religion
4
340 - Law
4
370 - Education
3
380 - Commerce, communications & transportation
3
600 - Technology
3
000 - Computer science, information & general works
2
350 - Public administration & military science
2
363 - Other social problems & services
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
610 - Medicine & health
2
657 - Accounting
2
170 - Ethics
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
720 - Architecture
1
780 - Music
1
800 - Literature & rhetoric
1