Classification
100 - Philosophy & psychology
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
3
333 - Economics of land & energy
2
370 - Education
2
380 - Commerce, communications & transportation
2
600 - Technology
2
610 - Medicine & health
2
900 - History & geography
2
000 - Computer science, information & general works
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
330 - Economics
1
363 - Other social problems & services
1
400 - Language
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
720 - Architecture
1