Classification
330 - Economics
580 - Plants (Botany)
000 - Computer science, information & general works
6
600 - Technology
5
333 - Economics of land & energy
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
620 - Engineering & allied operations
3
900 - History & geography
2
140 - Specific philosophical schools
1
414 - Phonology & phonetics
1
530 - Physics
1
630 - Agriculture & related technologies
1
658 - General management
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1