Classification
520 - Astronomy & allied sciences
300 - Social sciences
4
600 - Technology
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
530 - Physics
2
100 - Philosophy & psychology
1
320 - Political science
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
900 - History & geography
1