Classification
320 - Political science
330 - Economics
340 - Law
370 - Education
900 - History & geography
6
300 - Social sciences
5
100 - Philosophy & psychology
4
600 - Technology
4
140 - Specific philosophical schools
3
700 - The arts; fine & decorative arts
3
170 - Ethics
2
301 - Sociology & anthropology
2
400 - Language
2
620 - Engineering & allied operations
2
658 - General management
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
380 - Commerce, communications & transportation
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
657 - Accounting
1
770 - Photography, photographs & computer art
1
780 - Music
1