Classification
400 - Language
410 - Linguistics
2
900 - History & geography
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
700 - The arts; fine & decorative arts
1
780 - Music
1
800 - Literature & rhetoric
1