Classification
140 - Specific philosophical schools
320 - Political science
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
380 - Commerce, communications & transportation
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
900 - History & geography
2
304 - Factors affecting social behavior
1
370 - Education
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1