Classification
000 - Computer science, information & general works
600 - Technology
9
620 - Engineering & allied operations
9
900 - History & geography
700 - The arts; fine & decorative arts
6
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
800 - Literature & rhetoric
2
330 - Economics
1
340 - Law
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1