Classification
320 - Political science
333 - Economics of land & energy
3
363 - Other social problems & services
370 - Education
600 - Technology
3
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
900 - History & geography
330 - Economics
2
000 - Computer science, information & general works
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1
720 - Architecture
1