Classification
140 - Specific philosophical schools
414 - Phonology & phonetics
610 - Medicine & health
700 - The arts; fine & decorative arts
13
333 - Economics of land & energy
8
000 - Computer science, information & general works
7
363 - Other social problems & services
5
580 - Plants (Botany)
5
620 - Engineering & allied operations
5
380 - Commerce, communications & transportation
4
540 - Chemistry & allied sciences
4
576 - Genetics & evolution
4
612 - Human physiology
4
300 - Social sciences
3
500 - Natural sciences & mathematics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
301 - Sociology & anthropology
2
600 - Technology
2
615 - Pharmacology & therapeutics
2
900 - History & geography
2
304 - Factors affecting social behavior
1
330 - Economics
1
770 - Photography, photographs & computer art
1