Classification
301 - Sociology & anthropology
320 - Political science
330 - Economics
3
380 - Commerce, communications & transportation
2
900 - History & geography
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1