Classification
000 - Computer science, information & general works
2
320 - Political science
330 - Economics
2
581 - Specific topics in natural history
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
170 - Ethics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography
1