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