Classification
170 - Ethics
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
200 - Religion
2
320 - Political science
2
330 - Economics
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
158 - Applied psychology
1
333 - Economics of land & energy
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
658 - General management
1
900 - History & geography
1