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