Classification
000 - Computer science, information & general works
300 - Social sciences
304 - Factors affecting social behavior
1
320 - Political science
363 - Other social problems & services
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography