Classification
300 - Social sciences
2
301 - Sociology & anthropology
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
540 - Chemistry & allied sciences
1
900 - History & geography
1