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