Classification
000 - Computer science, information & general works
5
333 - Economics of land & energy
2
363 - Other social problems & services
3
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
581 - Specific topics in natural history
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
3
800 - Literature & rhetoric
1
900 - History & geography
3