Classification
400 - Language
410 - Linguistics
7
380 - Commerce, communications & transportation
4
370 - Education
3
800 - Literature & rhetoric
3
140 - Specific philosophical schools
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
300 - Social sciences
1
333 - Economics of land & energy
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1