Classification
330 - Economics
333 - Economics of land & energy
600 - Technology
3
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
3
900 - History & geography
3
000 - Computer science, information & general works
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
720 - Architecture
2
380 - Commerce, communications & transportation
1