Classification
320 - Political science
363 - Other social problems & services
380 - Commerce, communications & transportation
576 - Genetics & evolution
600 - Technology
5
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
140 - Specific philosophical schools
4
900 - History & geography
4
340 - Law
3
500 - Natural sciences & mathematics
3
720 - Architecture
3
330 - Economics
2
333 - Economics of land & energy
2
000 - Computer science, information & general works
1
300 - Social sciences
1
657 - Accounting
1