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