Classification
330 - Economics
340 - Law
3
320 - Political science
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
170 - Ethics
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
530 - Physics
1
576 - Genetics & evolution
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1