Classification
400 - Language
410 - Linguistics
12
700 - The arts; fine & decorative arts
8
370 - Education
7
380 - Commerce, communications & transportation
7
333 - Economics of land & energy
5
800 - Literature & rhetoric
5
304 - Factors affecting social behavior
4
330 - Economics
4
140 - Specific philosophical schools
3
414 - Phonology & phonetics
3
600 - Technology
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
320 - Political science
2
363 - Other social problems & services
2
576 - Genetics & evolution
2
900 - History & geography
2
100 - Philosophy & psychology
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1