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