Classification
100 - Philosophy & psychology
400 - Language
13
370 - Education
8
800 - Literature & rhetoric
5
900 - History & geography
5
333 - Economics of land & energy
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
301 - Sociology & anthropology
2
380 - Commerce, communications & transportation
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
300 - Social sciences
1
320 - Political science
1
340 - Law
1
363 - Other social problems & services
1
780 - Music
1