Classification
333 - Economics of land & energy
530 - Physics
600 - Technology
4
800 - Literature & rhetoric
900 - History & geography
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
551 - Geology, hydrology & meteorology
2
700 - The arts; fine & decorative arts
2
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1