Classification
370 - Education
630 - Agriculture & related technologies
330 - Economics
7
333 - Economics of land & energy
7
000 - Computer science, information & general works
5
320 - Political science
5
363 - Other social problems & services
5
551 - Geology, hydrology & meteorology
5
600 - Technology
5
700 - The arts; fine & decorative arts
5
380 - Commerce, communications & transportation
4
580 - Plants (Botany)
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
658 - General management
2
900 - History & geography
2
300 - Social sciences
1
304 - Factors affecting social behavior
1
336 - Public finance
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
657 - Accounting
1
770 - Photography, photographs & computer art
1