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