Classification
000 - Computer science, information & general works
200 - Religion
320 - Political science
700 - The arts; fine & decorative arts
900 - History & geography
363 - Other social problems & services
4
100 - Philosophy & psychology
3
301 - Sociology & anthropology
3
140 - Specific philosophical schools
2
300 - Social sciences
2
330 - Economics
2
600 - Technology
2
120 - Epistemology, causation & humankind
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
581 - Specific topics in natural history
1
800 - Literature & rhetoric
1