Classification
500 - Natural sciences & mathematics
580 - Plants (Botany)
700 - The arts; fine & decorative arts
581 - Specific topics in natural history
3
330 - Economics
2
333 - Economics of land & energy
2
600 - Technology
2
000 - Computer science, information & general works
1
363 - Other social problems & services
1
400 - Language
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1