Classification
300 - Social sciences
3
301 - Sociology & anthropology
330 - Economics
333 - Economics of land & energy
3
363 - Other social problems & services
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
320 - Political science
1
340 - Law
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
900 - History & geography
1