Classification
320 - Political science
330 - Economics
340 - Law
600 - Technology
900 - History & geography
300 - Social sciences
5
380 - Commerce, communications & transportation
5
620 - Engineering & allied operations
5
100 - Philosophy & psychology
3
301 - Sociology & anthropology
3
370 - Education
3
140 - Specific philosophical schools
2
170 - Ethics
2
400 - Language
2
000 - Computer science, information & general works
1
200 - Religion
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
657 - Accounting
1
658 - General management
1
700 - The arts; fine & decorative arts
1
780 - Music
1