Classification
600 - Technology
11
700 - The arts; fine & decorative arts
10
333 - Economics of land & energy
8
620 - Engineering & allied operations
7
900 - History & geography
7
380 - Commerce, communications & transportation
4
000 - Computer science, information & general works
2
363 - Other social problems & services
2
580 - Plants (Botany)
2
330 - Economics
1
576 - Genetics & evolution
1