Classification
320 - Political science
330 - Economics
363 - Other social problems & services
600 - Technology
800 - Literature & rhetoric
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
658 - General management
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
370 - Education
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
791 - Public performances
1