Classification
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
580 - Plants (Botany)
600 - Technology
610 - Medicine & health
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2