Classification
320 - Political science
330 - Economics
576 - Genetics & evolution
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
4
380 - Commerce, communications & transportation
4
363 - Other social problems & services
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
657 - Accounting
1
658 - General management
1
900 - History & geography
1