Classification
330 - Economics
363 - Other social problems & services
657 - Accounting
333 - Economics of land & energy
9
000 - Computer science, information & general works
8
600 - Technology
7
380 - Commerce, communications & transportation
6
320 - Political science
5
700 - The arts; fine & decorative arts
5
620 - Engineering & allied operations
4
140 - Specific philosophical schools
3
370 - Education
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
900 - History & geography
2
300 - Social sciences
1
340 - Law
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
720 - Architecture
1
800 - Literature & rhetoric
1