Classification
330 - Economics
333 - Economics of land & energy
3
370 - Education
600 - Technology
3
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
900 - History & geography
2
140 - Specific philosophical schools
1
300 - Social sciences
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
500 - Natural sciences & mathematics
1