Classification
580 - Plants (Botany)
610 - Medicine & health
12
581 - Specific topics in natural history
11
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
8
620 - Engineering & allied operations
8
576 - Genetics & evolution
7
333 - Economics of land & energy
6
380 - Commerce, communications & transportation
5
540 - Chemistry & allied sciences
5
140 - Specific philosophical schools
4
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
551 - Geology, hydrology & meteorology
4
612 - Human physiology
4
300 - Social sciences
3
414 - Phonology & phonetics
3
600 - Technology
3
615 - Pharmacology & therapeutics
3
100 - Philosophy & psychology
2
304 - Factors affecting social behavior
2
630 - Agriculture & related technologies
2
900 - History & geography
2
330 - Economics
1
590 - Animals (Zoology)
1
720 - Architecture
1
800 - Literature & rhetoric
1