Classification
600 - Technology
8
620 - Engineering & allied operations
8
363 - Other social problems & services
7
900 - History & geography
7
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
6
414 - Phonology & phonetics
4
576 - Genetics & evolution
3
580 - Plants (Botany)
3
330 - Economics
2
000 - Computer science, information & general works
1
610 - Medicine & health
1
800 - Literature & rhetoric
1