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