Classification
000 - Computer science, information & general works
2
363 - Other social problems & services
370 - Education
500 - Natural sciences & mathematics
900 - History & geography
100 - Philosophy & psychology
1
333 - Economics of land & energy
1
400 - Language
1
540 - Chemistry & allied sciences
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1