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