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