Classification
000 - Computer science, information & general works
320 - Political science
333 - Economics of land & energy
363 - Other social problems & services
370 - Education
600 - Technology
700 - The arts; fine & decorative arts
330 - Economics
3
551 - Geology, hydrology & meteorology
3
380 - Commerce, communications & transportation
2
620 - Engineering & allied operations
2
720 - Architecture
2
900 - History & geography
2
140 - Specific philosophical schools
1
300 - Social sciences
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1