Classification
580 - Plants (Botany)
610 - Medicine & health
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
600 - Technology
1
620 - Engineering & allied operations
1
900 - History & geography
1