Classification
000 - Computer science, information & general works
4
301 - Sociology & anthropology
363 - Other social problems & services
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
4
320 - Political science
3
900 - History & geography
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
581 - Specific topics in natural history
2
200 - Religion
1
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
590 - Animals (Zoology)
1
600 - Technology
1
630 - Agriculture & related technologies
1
780 - Music
1
791 - Public performances
1
800 - Literature & rhetoric
1