Classification
370 - Education
320 - Political science
7
330 - Economics
6
300 - Social sciences
5
900 - History & geography
3
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
200 - Religion
1
333 - Economics of land & energy
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
780 - Music
1
800 - Literature & rhetoric
1