Classification
333 - Economics of land & energy
6
600 - Technology
657 - Accounting
330 - Economics
5
000 - Computer science, information & general works
4
380 - Commerce, communications & transportation
4
700 - The arts; fine & decorative arts
4
320 - Political science
3
363 - Other social problems & services
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
576 - Genetics & evolution
2
300 - Social sciences
1
370 - Education
1
530 - Physics
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1
900 - History & geography
1