Classification
370 - Education
900 - History & geography
9
700 - The arts; fine & decorative arts
7
333 - Economics of land & energy
4
330 - Economics
3
363 - Other social problems & services
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
170 - Ethics
2
200 - Religion
2
340 - Law
2
380 - Commerce, communications & transportation
2
600 - Technology
2
720 - Architecture
2
100 - Philosophy & psychology
1
300 - Social sciences
1
301 - Sociology & anthropology
1
320 - Political science
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
620 - Engineering & allied operations
1
780 - Music
1
800 - Literature & rhetoric
1