Classification
330 - Economics
3
340 - Law
000 - Computer science, information & general works
2
320 - Political science
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
600 - Technology
2
370 - Education
1
576 - Genetics & evolution
1
610 - Medicine & health
1
657 - Accounting
1
900 - History & geography
1