Classification
140 - Specific philosophical schools
170 - Ethics
320 - Political science
600 - Technology
620 - Engineering & allied operations
100 - Philosophy & psychology
2
340 - Law
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
200 - Religion
1
330 - Economics
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1
900 - History & geography
1