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