Classification
170 - Ethics
100 - Philosophy & psychology
18
320 - Political science
14
900 - History & geography
14
340 - Law
11
140 - Specific philosophical schools
9
200 - Religion
9
330 - Economics
7
333 - Economics of land & energy
6
610 - Medicine & health
6
300 - Social sciences
5
800 - Literature & rhetoric
5
000 - Computer science, information & general works
4
304 - Factors affecting social behavior
4
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
301 - Sociology & anthropology
3
370 - Education
3
361 - Social problems & social welfare in general
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
600 - Technology
2
658 - General management
2
880 - Hellenic literatures; classical Greek
2
331 - Labor economics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
791 - Public performances
1