Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
580 - Plants (Botany)
600 - Technology
3
620 - Engineering & allied operations
333 - Economics of land & energy
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
000 - Computer science, information & general works
1
297 - Islam, Babism & Bahai Faith
1
576 - Genetics & evolution
1
658 - General management
1
900 - History & geography
1