Classification
000 - Computer science, information & general works
333 - Economics of land & energy
2
363 - Other social problems & services
530 - Physics
600 - Technology
330 - Economics
1
370 - Education
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1