Classification
100 - Philosophy & psychology
780 - Music
200 - Religion
3
320 - Political science
3
700 - The arts; fine & decorative arts
3
300 - Social sciences
2
800 - Literature & rhetoric
2
900 - History & geography
2
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
410 - Linguistics
1