Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
800 - Literature & rhetoric
900 - History & geography
3
000 - Computer science, information & general works
2
200 - Religion
2
300 - Social sciences
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
610 - Medicine & health
1