Classification
320 - Political science
333 - Economics of land & energy
2
540 - Chemistry & allied sciences
000 - Computer science, information & general works
1
300 - Social sciences
1
363 - Other social problems & services
1
370 - Education
1
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1
900 - History & geography
1