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