Classification
330 - Economics
5
333 - Economics of land & energy
5
658 - General management
700 - The arts; fine & decorative arts
600 - Technology
4
000 - Computer science, information & general works
3
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
900 - History & geography
2
320 - Political science
1
380 - Commerce, communications & transportation
1
530 - Physics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1