Classification
000 - Computer science, information & general works
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
581 - Specific topics in natural history
333 - Economics of land & energy
4
140 - Specific philosophical schools
3
320 - Political science
3
576 - Genetics & evolution
3
700 - The arts; fine & decorative arts
3
304 - Factors affecting social behavior
2
370 - Education
2
900 - History & geography
2
300 - Social sciences
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
657 - Accounting
1