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