Classification
630 - Agriculture & related technologies
7
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
5
363 - Other social problems & services
5
320 - Political science
4
330 - Economics
4
610 - Medicine & health
4
600 - Technology
3
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
140 - Specific philosophical schools
1
170 - Ethics
1
340 - Law
1
657 - Accounting
1
800 - Literature & rhetoric
1