Classification
000 - Computer science, information & general works
1
170 - Ethics
320 - Political science
330 - Economics
333 - Economics of land & energy
1
370 - Education
1
530 - Physics
581 - Specific topics in natural history
1
600 - Technology
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
900 - History & geography