Classification
140 - Specific philosophical schools
15
320 - Political science
330 - Economics
576 - Genetics & evolution
900 - History & geography
5
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
100 - Philosophy & psychology
3
700 - The arts; fine & decorative arts
3
300 - Social sciences
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
340 - Law
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
620 - Engineering & allied operations
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
400 - Language
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
657 - Accounting
1
658 - General management
1