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