Classification
600 - Technology
10
620 - Engineering & allied operations
7
580 - Plants (Botany)
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
610 - Medicine & health
5
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
304 - Factors affecting social behavior
2
330 - Economics
2
363 - Other social problems & services
2
414 - Phonology & phonetics
2
900 - History & geography
2
140 - Specific philosophical schools
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1