Classification
581 - Specific topics in natural history
580 - Plants (Botany)
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
300 - Social sciences
1
301 - Sociology & anthropology
1
320 - Political science
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1
900 - History & geography
1