Classification
000 - Computer science, information & general works
3
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
3
800 - Literature & rhetoric
500 - Natural sciences & mathematics
2
580 - Plants (Botany)
2
610 - Medicine & health
2
320 - Political science
1
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1