Classification
330 - Economics
333 - Economics of land & energy
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
600 - Technology
2
610 - Medicine & health
620 - Engineering & allied operations
800 - Literature & rhetoric
140 - Specific philosophical schools
1
370 - Education
1
658 - General management
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1