Classification
140 - Specific philosophical schools
320 - Political science
380 - Commerce, communications & transportation
600 - Technology
7
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
6
363 - Other social problems & services
5
900 - History & geography
5
333 - Economics of land & energy
4
500 - Natural sciences & mathematics
4
576 - Genetics & evolution
4
330 - Economics
3
340 - Law
3
720 - Architecture
3
000 - Computer science, information & general works
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
1
657 - Accounting
1