Classification
363 - Other social problems & services
600 - Technology
7
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
580 - Plants (Botany)
5
900 - History & geography
5
414 - Phonology & phonetics
4
576 - Genetics & evolution
4
333 - Economics of land & energy
3
140 - Specific philosophical schools
1
330 - Economics
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1