Classification
320 - Political science
361 - Social problems & social welfare in general
363 - Other social problems & services
000 - Computer science, information & general works
5
140 - Specific philosophical schools
4
600 - Technology
4
330 - Economics
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
700 - The arts; fine & decorative arts
3
200 - Religion
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
170 - Ethics
1
301 - Sociology & anthropology
1
336 - Public finance
1
340 - Law
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
800 - Literature & rhetoric
1
900 - History & geography
1