Classification
333 - Economics of land & energy
400 - Language
410 - Linguistics
370 - Education
4
700 - The arts; fine & decorative arts
3
414 - Phonology & phonetics
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
300 - Social sciences
1
500 - Natural sciences & mathematics
1
600 - Technology
1
900 - History & geography
1