Classification
140 - Specific philosophical schools
400 - Language
600 - Technology
610 - Medicine & health
4
700 - The arts; fine & decorative arts
4
304 - Factors affecting social behavior
2
330 - Economics
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
620 - Engineering & allied operations
1
900 - History & geography
1