Classification
520 - Astronomy & allied sciences
500 - Natural sciences & mathematics
3
000 - Computer science, information & general works
2
530 - Physics
2
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1
900 - History & geography
1