Classification
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
370 - Education
380 - Commerce, communications & transportation
600 - Technology
2
620 - Engineering & allied operations
2
658 - General management
700 - The arts; fine & decorative arts
900 - History & geography
320 - Political science
1
580 - Plants (Botany)
1
610 - Medicine & health
1
720 - Architecture
1
800 - Literature & rhetoric
1