Classification
330 - Economics
363 - Other social problems & services
5
000 - Computer science, information & general works
3
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
540 - Chemistry & allied sciences
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
600 - Technology
1
610 - Medicine & health
1
800 - Literature & rhetoric
1