Classification
300 - Social sciences
330 - Economics
2
370 - Education
500 - Natural sciences & mathematics
600 - Technology
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
658 - General management
1
720 - Architecture
1
900 - History & geography
1