Classification
140 - Specific philosophical schools
400 - Language
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
900 - History & geography
9
100 - Philosophy & psychology
7
410 - Linguistics
7
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
4
780 - Music
4
200 - Religion
3
304 - Factors affecting social behavior
3
320 - Political science
3
330 - Economics
3
363 - Other social problems & services
3
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
600 - Technology
2
610 - Medicine & health
2
300 - Social sciences
1
580 - Plants (Botany)
1
590 - Animals (Zoology)
1
770 - Photography, photographs & computer art
1
791 - Public performances
1