Classification
363 - Other social problems & services
3
370 - Education
380 - Commerce, communications & transportation
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
400 - Language
2
600 - Technology
2
720 - Architecture
2
900 - History & geography
2
330 - Economics
1
333 - Economics of land & energy
1
780 - Music
1