Classification
100 - Philosophy & psychology
320 - Political science
370 - Education
380 - Commerce, communications & transportation
410 - Linguistics
000 - Computer science, information & general works
2
400 - Language
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
780 - Music
1
800 - Literature & rhetoric
1
900 - History & geography
1