Classification
140 - Specific philosophical schools
170 - Ethics
200 - Religion
2
330 - Economics
333 - Economics of land & energy
2
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
320 - Political science
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1