Classification
330 - Economics
3
700 - The arts; fine & decorative arts
333 - Economics of land & energy
2
600 - Technology
2
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
900 - History & geography
1