Classification
170 - Ethics
320 - Political science
330 - Economics
610 - Medicine & health
100 - Philosophy & psychology
4
600 - Technology
3
300 - Social sciences
2
333 - Economics of land & energy
2
620 - Engineering & allied operations
2
000 - Computer science, information & general works
1
370 - Education
1
530 - Physics
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1