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