Classification
100 - Philosophy & psychology
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
5
630 - Agriculture & related technologies
333 - Economics of land & energy
4
610 - Medicine & health
4
700 - The arts; fine & decorative arts
4
320 - Political science
3
330 - Economics
3
170 - Ethics
2
300 - Social sciences
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
301 - Sociology & anthropology
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
900 - History & geography
1