Classification
200 - Religion
301 - Sociology & anthropology
900 - History & geography
4
300 - Social sciences
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
320 - Political science
2
330 - Economics
2
363 - Other social problems & services
2
370 - Education
2
600 - Technology
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
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
530 - Physics
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1