Classification
700 - The arts; fine & decorative arts
610 - Medicine & health
9
000 - Computer science, information & general works
8
333 - Economics of land & energy
6
540 - Chemistry & allied sciences
5
580 - Plants (Botany)
5
900 - History & geography
5
600 - Technology
4
140 - Specific philosophical schools
3
330 - Economics
3
363 - Other social problems & services
3
620 - Engineering & allied operations
3
304 - Factors affecting social behavior
2
615 - Pharmacology & therapeutics
2