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