Classification
363 - Other social problems & services
6
380 - Commerce, communications & transportation
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
900 - History & geography
140 - Specific philosophical schools
5
000 - Computer science, information & general works
4
320 - Political science
4
330 - Economics
3
333 - Economics of land & energy
3
600 - Technology
3
301 - Sociology & anthropology
2
551 - Geology, hydrology & meteorology
2
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
200 - Religion
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
590 - Animals (Zoology)
1
780 - Music
1
791 - Public performances
1
800 - Literature & rhetoric
1