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