Classification
600 - Technology
3
610 - Medicine & health
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
3
900 - History & geography
000 - Computer science, information & general works
1
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1