Classification
100 - Philosophy & psychology
400 - Language
700 - The arts; fine & decorative arts
5
300 - Social sciences
4
380 - Commerce, communications & transportation
4
600 - Technology
4
780 - Music
4
000 - Computer science, information & general works
3
320 - Political science
3
330 - Economics
3
370 - Education
3
620 - Engineering & allied operations
3
900 - History & geography
3
333 - Economics of land & energy
2
340 - Law
2
410 - Linguistics
2
140 - Specific philosophical schools
1
414 - Phonology & phonetics
1
630 - Agriculture & related technologies
1
658 - General management
1