Classification
300 - Social sciences
330 - Economics
333 - Economics of land & energy
620 - Engineering & allied operations
600 - Technology
5
363 - Other social problems & services
4
370 - Education
4
320 - Political science
3
900 - History & geography
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
340 - Law
1
400 - Language
1
500 - Natural sciences & mathematics
1