Classification
170 - Ethics
320 - Political science
330 - Economics
100 - Philosophy & psychology
16
300 - Social sciences
11
333 - Economics of land & energy
10
140 - Specific philosophical schools
8
363 - Other social problems & services
7
700 - The arts; fine & decorative arts
7
000 - Computer science, information & general works
5
600 - Technology
5
620 - Engineering & allied operations
5
900 - History & geography
5
200 - Religion
4
370 - Education
4
380 - Commerce, communications & transportation
4
551 - Geology, hydrology & meteorology
4
610 - Medicine & health
4
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
340 - Law
2
361 - Social problems & social welfare in general
2
658 - General management
2
800 - Literature & rhetoric
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
630 - Agriculture & related technologies
1