Classification
000 - Computer science, information & general works
2
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
1
320 - Political science
1
333 - Economics of land & energy
3
363 - Other social problems & services
370 - Education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
610 - Medicine & health
3
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
720 - Architecture
1
800 - Literature & rhetoric
1
900 - History & geography