Classification
000 - Computer science, information & general works
1
330 - Economics
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
1
900 - History & geography