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