Classification
000 - Computer science, information & general works
2
580 - Plants (Botany)
600 - Technology
2
610 - Medicine & health
700 - The arts; fine & decorative arts
2
304 - Factors affecting social behavior
1
330 - Economics
1
333 - Economics of land & energy
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1