Classification
900 - History & geography
23
800 - Literature & rhetoric
12
400 - Language
8
410 - Linguistics
8
370 - Education
6
100 - Philosophy & psychology
5
700 - The arts; fine & decorative arts
5
140 - Specific philosophical schools
4
301 - Sociology & anthropology
3
791 - Public performances
3
000 - Computer science, information & general works
2
170 - Ethics
2
320 - Political science
2
581 - Specific topics in natural history
2
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1