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