Classification
333 - Economics of land & energy
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
330 - Economics
2
900 - History & geography
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
370 - Education
1
600 - Technology
1
610 - Medicine & health
1