Classification
170 - Ethics
363 - Other social problems & services
600 - Technology
4
610 - Medicine & health
3
700 - The arts; fine & decorative arts
3
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
620 - Engineering & allied operations
2
900 - History & geography
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
320 - Political science
1
330 - Economics
1
720 - Architecture
1