Classification
170 - Ethics
330 - Economics
630 - Agriculture & related technologies
100 - Philosophy & psychology
2
320 - Political science
2
600 - Technology
2
620 - Engineering & allied operations
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
700 - The arts; fine & decorative arts
1