Classification
333 - Economics of land & energy
600 - Technology
2
612 - Human physiology
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1