Classification
100 - Philosophy & psychology
300 - Social sciences
320 - Political science
4
363 - Other social problems & services
900 - History & geography
330 - Economics
3
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
200 - Religion
2
301 - Sociology & anthropology
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
350 - Public administration & military science
1
400 - Language
1
410 - Linguistics
1
600 - Technology
1
610 - Medicine & health
1
800 - Literature & rhetoric
1