Classification
530 - Physics
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
540 - Chemistry & allied sciences
2
600 - Technology
2
140 - Specific philosophical schools
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1