Classification
000 - Computer science, information & general works
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1