Classification
580 - Plants (Botany)
600 - Technology
3
620 - Engineering & allied operations
630 - Agriculture & related technologies
000 - Computer science, information & general works
2
363 - Other social problems & services
2
333 - Economics of land & energy
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
612 - Human physiology
1
900 - History & geography
1