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