Classification
100 - Philosophy & psychology
330 - Economics
320 - Political science
14
900 - History & geography
9
333 - Economics of land & energy
5
140 - Specific philosophical schools
4
170 - Ethics
3
340 - Law
3
380 - Commerce, communications & transportation
3
000 - Computer science, information & general works
2
200 - Religion
2
581 - Specific topics in natural history
2
700 - The arts; fine & decorative arts
2
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
600 - Technology
1
657 - Accounting
1
658 - General management
1
780 - Music
1
800 - Literature & rhetoric
1