Classification
000 - Computer science, information & general works
333 - Economics of land & energy
540 - Chemistry & allied sciences
600 - Technology
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
300 - Social sciences
1
320 - Political science
1
330 - Economics
1
370 - Education
1
500 - Natural sciences & mathematics
1
530 - Physics
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
657 - Accounting
1
900 - History & geography
1