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