Classification
140 - Specific philosophical schools
200 - Religion
320 - Political science
380 - Commerce, communications & transportation
581 - Specific topics in natural history
3
900 - History & geography
3
000 - Computer science, information & general works
2
361 - Social problems & social welfare in general
2
363 - Other social problems & services
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
301 - Sociology & anthropology
1
800 - Literature & rhetoric
1