Classification
200 - Religion
300 - Social sciences
320 - Political science
900 - History & geography
100 - Philosophy & psychology
10
301 - Sociology & anthropology
5
330 - Economics
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
400 - Language
3
000 - Computer science, information & general works
2
120 - Epistemology, causation & humankind
2
340 - Law
2
363 - Other social problems & services
2
410 - Linguistics
2
700 - The arts; fine & decorative arts
2
780 - Music
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
170 - Ethics
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
370 - Education
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1