Classification
140 - Specific philosophical schools
330 - Economics
400 - Language
600 - Technology
380 - Commerce, communications & transportation
5
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
620 - Engineering & allied operations
4
363 - Other social problems & services
3
900 - History & geography
3
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
2
340 - Law
2
370 - Education
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
300 - Social sciences
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
720 - Architecture
1