Classification
300 - Social sciences
320 - Political science
363 - Other social problems & services
2
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
900 - History & geography
1