Classification
000 - Computer science, information & general works
170 - Ethics
320 - Political science
330 - Economics
1
380 - Commerce, communications & transportation
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1