Classification
000 - Computer science, information & general works
400 - Language
600 - Technology
620 - Engineering & allied operations
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
3
330 - Economics
2
380 - Commerce, communications & transportation
2
900 - History & geography
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
370 - Education
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
780 - Music
1