Classification
370 - Education
4
600 - Technology
320 - Political science
2
380 - Commerce, communications & transportation
2
000 - Computer science, information & general works
1
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
700 - The arts; fine & decorative arts
1
791 - Public performances
1
900 - History & geography
1