Classification
370 - Education
600 - Technology
5
610 - Medicine & health
900 - History & geography
100 - Philosophy & psychology
3
300 - Social sciences
3
333 - Economics of land & energy
3
320 - Political science
2
330 - Economics
2
363 - Other social problems & services
2
620 - Engineering & allied operations
2
170 - Ethics
1
301 - Sociology & anthropology
1
380 - Commerce, communications & transportation
1
658 - General management
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1