Classification
320 - Political science
900 - History & geography
8
300 - Social sciences
7
340 - Law
6
700 - The arts; fine & decorative arts
5
363 - Other social problems & services
4
330 - Economics
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
400 - Language
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
780 - Music
1