Classification
333 - Economics of land & energy
363 - Other social problems & services
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
8
600 - Technology
6
000 - Computer science, information & general works
4
620 - Engineering & allied operations
4
580 - Plants (Botany)
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
900 - History & geography
3
330 - Economics
2
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
612 - Human physiology
1