Classification
000 - Computer science, information & general works
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
4
400 - Language
3
720 - Architecture
3
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
620 - Engineering & allied operations
2
140 - Specific philosophical schools
1
300 - Social sciences
1
370 - Education
1
520 - Astronomy & allied sciences
1
600 - Technology
1
800 - Literature & rhetoric
1