Classification
600 - Technology
3
330 - Economics
2
333 - Economics of land & energy
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1