Classification
300 - Social sciences
320 - Political science
3
330 - Economics
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
600 - Technology
3
001 - Knowledge
1
140 - Specific philosophical schools
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
657 - Accounting
1
700 - The arts; fine & decorative arts
1