Classification
333 - Economics of land & energy
551 - Geology, hydrology & meteorology
580 - Plants (Botany)
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
1
320 - Political science
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
530 - Physics
1
576 - Genetics & evolution
1
600 - Technology
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1