Classification
170 - Ethics
320 - Political science
330 - Economics
2
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
658 - General management
1
700 - The arts; fine & decorative arts
1