Classification
540 - Chemistry & allied sciences
630 - Agriculture & related technologies
000 - Computer science, information & general works
7
363 - Other social problems & services
6
330 - Economics
5
600 - Technology
5
620 - Engineering & allied operations
5
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
610 - Medicine & health
4
580 - Plants (Botany)
3
581 - Specific topics in natural history
2
612 - Human physiology
2
320 - Political science
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1