Classification
400 - Language
370 - Education
7
304 - Factors affecting social behavior
4
700 - The arts; fine & decorative arts
4
900 - History & geography
4
100 - Philosophy & psychology
3
610 - Medicine & health
3
300 - Social sciences
2
380 - Commerce, communications & transportation
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
600 - Technology
1
658 - General management
1
800 - Literature & rhetoric
1