Classification
320 - Political science
330 - Economics
370 - Education
2
530 - Physics
600 - Technology
610 - Medicine & health
900 - History & geography
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
333 - Economics of land & energy
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
780 - Music
1