Classification
580 - Plants (Botany)
610 - Medicine & health
333 - Economics of land & energy
3
700 - The arts; fine & decorative arts
3
600 - Technology
2
000 - Computer science, information & general works
1
330 - Economics
1
363 - Other social problems & services
1
400 - Language
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
900 - History & geography
1