Classification
300 - Social sciences
7
700 - The arts; fine & decorative arts
6
320 - Political science
5
330 - Economics
3
900 - History & geography
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
600 - Technology
2
100 - Philosophy & psychology
1
340 - Law
1
370 - Education
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
780 - Music
1
800 - Literature & rhetoric
1