Classification
300 - Social sciences
330 - Economics
576 - Genetics & evolution
700 - The arts; fine & decorative arts
600 - Technology
2
658 - General management
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
320 - Political science
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
720 - Architecture
1