Classification
610 - Medicine & health
700 - The arts; fine & decorative arts
13
000 - Computer science, information & general works
10
333 - Economics of land & energy
10
363 - Other social problems & services
9
630 - Agriculture & related technologies
9
551 - Geology, hydrology & meteorology
8
600 - Technology
7
140 - Specific philosophical schools
6
580 - Plants (Botany)
6
900 - History & geography
5
320 - Political science
4
330 - Economics
4
620 - Engineering & allied operations
4
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
800 - Literature & rhetoric
2
550 - Earth sciences
1
576 - Genetics & evolution
1
615 - Pharmacology & therapeutics
1
658 - General management
1