Classification
140 - Specific philosophical schools
300 - Social sciences
630 - Agriculture & related technologies
330 - Economics
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
600 - Technology
3
620 - Engineering & allied operations
3
301 - Sociology & anthropology
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
320 - Political science
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
780 - Music
1