Classification
340 - Law
330 - Economics
7
320 - Political science
6
900 - History & geography
5
363 - Other social problems & services
3
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
400 - Language
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
580 - Plants (Botany)
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
780 - Music
1
800 - Literature & rhetoric
1