Classification
333 - Economics of land & energy
370 - Education
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
200 - Religion
1
363 - Other social problems & services
1
400 - Language
1
600 - Technology
1
620 - Engineering & allied operations
1
658 - General management
1
900 - History & geography
1