Classification
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
8
620 - Engineering & allied operations
8
330 - Economics
7
320 - Political science
5
333 - Economics of land & energy
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
2
000 - Computer science, information & general works
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
720 - Architecture
1