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