Classification
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
400 - Language
1
540 - Chemistry & allied sciences
600 - Technology
1
620 - Engineering & allied operations
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
900 - History & geography
1