Classification
530 - Physics
000 - Computer science, information & general works
12
140 - Specific philosophical schools
5
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
540 - Chemistry & allied sciences
3
580 - Plants (Botany)
3
610 - Medicine & health
3
620 - Engineering & allied operations
2
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
800 - Literature & rhetoric
1
900 - History & geography
1