Classification
320 - Political science
500 - Natural sciences & mathematics
330 - Economics
3
700 - The arts; fine & decorative arts
3
333 - Economics of land & energy
2
414 - Phonology & phonetics
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
363 - Other social problems & services
1
540 - Chemistry & allied sciences
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
900 - History & geography
1