Classification
330 - Economics
580 - Plants (Botany)
000 - Computer science, information & general works
5
600 - Technology
4
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
610 - Medicine & health
3
363 - Other social problems & services
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
658 - General management
1
900 - History & geography
1