Classification
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
1