Classification
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
600 - Technology
2
330 - Economics
1
333 - Economics of land & energy
1
549 - Mineralogy
1
580 - Plants (Botany)
1
690 - Buildings
1
691 - Building materials
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1