Classification
551 - Geology, hydrology & meteorology
581 - Specific topics in natural history
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
580 - Plants (Botany)
2
600 - Technology
2
620 - Engineering & allied operations
2
900 - History & geography
2
410 - Linguistics
1
610 - Medicine & health
1