Classification
140 - Specific philosophical schools
3
333 - Economics of land & energy
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
620 - Engineering & allied operations
1
658 - General management
1