Classification
330 - Economics
551 - Geology, hydrology & meteorology
720 - Architecture
333 - Economics of land & energy
10
363 - Other social problems & services
10
000 - Computer science, information & general works
8
380 - Commerce, communications & transportation
6
600 - Technology
6
700 - The arts; fine & decorative arts
6
900 - History & geography
5
320 - Political science
4
610 - Medicine & health
4
140 - Specific philosophical schools
3
370 - Education
3
580 - Plants (Botany)
3
620 - Engineering & allied operations
2
170 - Ethics
1
630 - Agriculture & related technologies
1