Classification
530 - Physics
540 - Chemistry & allied sciences
576 - Genetics & evolution
600 - Technology
3
620 - Engineering & allied operations
500 - Natural sciences & mathematics
2
100 - Philosophy & psychology
1
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1
900 - History & geography
1