Classification
400 - Language
414 - Phonology & phonetics
410 - Linguistics
27
380 - Commerce, communications & transportation
6
370 - Education
5
900 - History & geography
4
700 - The arts; fine & decorative arts
3
780 - Music
2
100 - Philosophy & psychology
1
300 - Social sciences
1
333 - Economics of land & energy
1
340 - Law
1
576 - Genetics & evolution
1