Classification
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
600 - Technology
3
700 - The arts; fine & decorative arts
3
576 - Genetics & evolution
2
620 - Engineering & allied operations
2
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
900 - History & geography
1