Classification
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
770 - Photography, photographs & computer art
900 - History & geography
333 - Economics of land & energy
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1