Classification
301 - Sociology & anthropology
320 - Political science
380 - Commerce, communications & transportation
900 - History & geography
300 - Social sciences
5
200 - Religion
4
000 - Computer science, information & general works
3
330 - Economics
3
700 - The arts; fine & decorative arts
3
363 - Other social problems & services
2
600 - Technology
2
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
340 - Law
1
361 - Social problems & social welfare in general
1
400 - Language
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1