Classification
370 - Education
7
400 - Language
5
500 - Natural sciences & mathematics
4
320 - Political science
3
330 - Economics
3
410 - Linguistics
3
900 - History & geography
3
100 - Philosophy & psychology
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
340 - Law
1
530 - Physics
1
540 - Chemistry & allied sciences
1
600 - Technology
1
620 - Engineering & allied operations
1