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