Classification
600 - Technology
658 - General management
900 - History & geography
4
000 - Computer science, information & general works
3
330 - Economics
3
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
320 - Political science
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
800 - Literature & rhetoric
1