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