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