Classification
320 - Political science
4
333 - Economics of land & energy
4
600 - Technology
700 - The arts; fine & decorative arts
4
330 - Economics
3
363 - Other social problems & services
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
900 - History & geography
2
000 - Computer science, information & general works
1
581 - Specific topics in natural history
1
658 - General management
1
720 - Architecture
1