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