Classification
340 - Law
600 - Technology
5
620 - Engineering & allied operations
900 - History & geography
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
414 - Phonology & phonetics
3
576 - Genetics & evolution
3
551 - Geology, hydrology & meteorology
2
320 - Political science
1
363 - Other social problems & services
1
530 - Physics
1