Classification
900 - History & geography
330 - Economics
54
320 - Political science
52
300 - Social sciences
44
576 - Genetics & evolution
36
340 - Law
3
333 - Economics of land & energy
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1