Classification
330 - Economics
500 - Natural sciences & mathematics
600 - Technology
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
620 - Engineering & allied operations
2
658 - General management
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
320 - Political science
1
361 - Social problems & social welfare in general
1
370 - Education
1
380 - Commerce, communications & transportation
1
530 - Physics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
720 - Architecture
1
900 - History & geography
1