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