Classification
100 - Philosophy & psychology
200 - Religion
330 - Economics
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
170 - Ethics
1
333 - Economics of land & energy
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1