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