Classification
301 - Sociology & anthropology
576 - Genetics & evolution
9
900 - History & geography
6
300 - Social sciences
4
700 - The arts; fine & decorative arts
4
100 - Philosophy & psychology
3
320 - Political science
3
000 - Computer science, information & general works
2
370 - Education
2
530 - Physics
2
581 - Specific topics in natural history
2
600 - Technology
2
140 - Specific philosophical schools
1
200 - Religion
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
540 - Chemistry & allied sciences
1
620 - Engineering & allied operations
1
780 - Music
1