Classification
333 - Economics of land & energy
551 - Geology, hydrology & meteorology
000 - Computer science, information & general works
8
700 - The arts; fine & decorative arts
5
580 - Plants (Botany)
4
620 - Engineering & allied operations
4
330 - Economics
3
363 - Other social problems & services
3
600 - Technology
3
800 - Literature & rhetoric
3
900 - History & geography
3
140 - Specific philosophical schools
2
530 - Physics
2
576 - Genetics & evolution
2
630 - Agriculture & related technologies
2
320 - Political science
1
370 - Education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
658 - General management
1
720 - Architecture
1