Classification
333 - Economics of land & energy
330 - Economics
15
320 - Political science
13
370 - Education
9
700 - The arts; fine & decorative arts
9
300 - Social sciences
8
900 - History & geography
7
363 - Other social problems & services
6
380 - Commerce, communications & transportation
5
600 - Technology
4
000 - Computer science, information & general works
3
100 - Philosophy & psychology
3
340 - Law
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
400 - Language
2
530 - Physics
2
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
657 - Accounting
1
720 - Architecture
1