Classification
300 - Social sciences
320 - Political science
2
330 - Economics
333 - Economics of land & energy
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
600 - Technology
140 - Specific philosophical schools
1
350 - Public administration & military science
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1