Classification
320 - Political science
330 - Economics
551 - Geology, hydrology & meteorology
600 - Technology
620 - Engineering & allied operations
333 - Economics of land & energy
9
363 - Other social problems & services
9
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
580 - Plants (Botany)
4
900 - History & geography
4
610 - Medicine & health
3
630 - Agriculture & related technologies
3
380 - Commerce, communications & transportation
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
340 - Law
1
360 - Social problems & services; associations
1
581 - Specific topics in natural history
1
720 - Architecture
1