Classification
000 - Computer science, information & general works
333 - Economics of land & energy
6
530 - Physics
6
700 - The arts; fine & decorative arts
4
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
520 - Astronomy & allied sciences
2
400 - Language
1
600 - Technology
1
620 - Engineering & allied operations
1