Classification
320 - Political science
2
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
600 - Technology
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
720 - Architecture
2
900 - History & geography
2
000 - Computer science, information & general works
1