Classification
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
600 - Technology
6
620 - Engineering & allied operations
5
333 - Economics of land & energy
4
140 - Specific philosophical schools
2
580 - Plants (Botany)
2
610 - Medicine & health
2
500 - Natural sciences & mathematics
1
630 - Agriculture & related technologies
1
900 - History & geography
1