Classification
320 - Political science
363 - Other social problems & services
551 - Geology, hydrology & meteorology
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
330 - Economics
4
620 - Engineering & allied operations
4
333 - Economics of land & energy
3
610 - Medicine & health
3
370 - Education
2
380 - Commerce, communications & transportation
2
720 - Architecture
2
000 - Computer science, information & general works
1
170 - Ethics
1
360 - Social problems & services; associations
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1