Classification
320 - Political science
330 - Economics
361 - Social problems & social welfare in general
380 - Commerce, communications & transportation
333 - Economics of land & energy
3
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
300 - Social sciences
1
336 - Public finance
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
658 - General management
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1