Classification
700 - The arts; fine & decorative arts
5
900 - History & geography
100 - Philosophy & psychology
3
720 - Architecture
3
140 - Specific philosophical schools
2
600 - Technology
2
000 - Computer science, information & general works
1
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1