Classification
100 - Philosophy & psychology
300 - Social sciences
363 - Other social problems & services
600 - Technology
610 - Medicine & health
3
320 - Political science
2
330 - Economics
2
333 - Economics of land & energy
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
170 - Ethics
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1