Classification
551 - Geology, hydrology & meteorology
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
000 - Computer science, information & general works
10
333 - Economics of land & energy
7
363 - Other social problems & services
7
330 - Economics
6
320 - Political science
4
580 - Plants (Botany)
4
600 - Technology
4
610 - Medicine & health
4
140 - Specific philosophical schools
3
500 - Natural sciences & mathematics
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
900 - History & geography
3
380 - Commerce, communications & transportation
2
530 - Physics
2
297 - Islam, Babism & Bahai Faith
1