Classification
000 - Computer science, information & general works
6
600 - Technology
6
620 - Engineering & allied operations
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
610 - Medicine & health
4
580 - Plants (Botany)
3
900 - History & geography
3
140 - Specific philosophical schools
2
330 - Economics
2
363 - Other social problems & services
2
300 - Social sciences
1
320 - Political science
1
370 - Education
1
581 - Specific topics in natural history
1
658 - General management
1