Classification
330 - Economics
363 - Other social problems & services
5
580 - Plants (Botany)
610 - Medicine & health
000 - Computer science, information & general works
4
333 - Economics of land & energy
3
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
700 - The arts; fine & decorative arts
2
340 - Law
1
400 - Language
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1