Classification
580 - Plants (Botany)
610 - Medicine & health
700 - The arts; fine & decorative arts
21
000 - Computer science, information & general works
16
363 - Other social problems & services
13
333 - Economics of land & energy
12
140 - Specific philosophical schools
9
380 - Commerce, communications & transportation
9
540 - Chemistry & allied sciences
9
620 - Engineering & allied operations
8
551 - Geology, hydrology & meteorology
7
581 - Specific topics in natural history
6
414 - Phonology & phonetics
5
576 - Genetics & evolution
5
800 - Literature & rhetoric
5
304 - Factors affecting social behavior
4
330 - Economics
4
600 - Technology
4
612 - Human physiology
4
300 - Social sciences
3
500 - Natural sciences & mathematics
3
100 - Philosophy & psychology
2
590 - Animals (Zoology)
2
361 - Social problems & social welfare in general
1
530 - Physics
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1
900 - History & geography
1