Classification
320 - Political science
330 - Economics
370 - Education
2
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
2
658 - General management
700 - The arts; fine & decorative arts
900 - History & geography
100 - Philosophy & psychology
1
300 - Social sciences
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
580 - Plants (Botany)
1
720 - Architecture
1
780 - Music
1