Classification
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
4
333 - Economics of land & energy
3
580 - Plants (Botany)
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
330 - Economics
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
900 - History & geography
1