Classification
551 - Geology, hydrology & meteorology
630 - Agriculture & related technologies
000 - Computer science, information & general works
2
320 - Political science
2
333 - Economics of land & energy
2
540 - Chemistry & allied sciences
2
600 - Technology
2
300 - Social sciences
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
657 - Accounting
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1