Classification
380 - Commerce, communications & transportation
620 - Engineering & allied operations
2
800 - Literature & rhetoric
2
900 - History & geography
2
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
1
700 - The arts; fine & decorative arts
1