Classification
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
720 - Architecture
2
140 - Specific philosophical schools
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
900 - History & geography
1