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