Classification
900 - History & geography
11
800 - Literature & rhetoric
6
370 - Education
4
320 - Political science
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
400 - Language
2
410 - Linguistics
2
780 - Music
2
100 - Philosophy & psychology
1
200 - Religion
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
600 - Technology
1
610 - Medicine & health
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
770 - Photography, photographs & computer art
1