Classification
600 - Technology
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
000 - Computer science, information & general works
1
300 - Social sciences
1
330 - Economics
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
780 - Music
1