Classification
370 - Education
600 - Technology
100 - Philosophy & psychology
6
333 - Economics of land & energy
6
300 - Social sciences
4
380 - Commerce, communications & transportation
4
000 - Computer science, information & general works
3
700 - The arts; fine & decorative arts
3
780 - Music
3
610 - Medicine & health
2
900 - History & geography
2
301 - Sociology & anthropology
1
320 - Political science
1
363 - Other social problems & services
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1