Classification
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
720 - Architecture
6
363 - Other social problems & services
5
600 - Technology
5
900 - History & geography
5
610 - Medicine & health
4
620 - Engineering & allied operations
3
370 - Education
2
551 - Geology, hydrology & meteorology
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
800 - Literature & rhetoric
1