Classification
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
590 - Animals (Zoology)
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
340 - Law
1
414 - Phonology & phonetics
1
530 - Physics
1
580 - Plants (Botany)
1
900 - History & geography
1