Classification
100 - Philosophy & psychology
330 - Economics
610 - Medicine & health
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
600 - Technology
3
000 - Computer science, information & general works
2
363 - Other social problems & services
2
370 - Education
2
900 - History & geography
2
300 - Social sciences
1
320 - Political science
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
400 - Language
1
620 - Engineering & allied operations
1
780 - Music
1