Classification
333 - Economics of land & energy
7
551 - Geology, hydrology & meteorology
600 - Technology
700 - The arts; fine & decorative arts
720 - Architecture
7
363 - Other social problems & services
6
380 - Commerce, communications & transportation
5
900 - History & geography
5
000 - Computer science, information & general works
4
320 - Political science
4
330 - Economics
4
370 - Education
4
610 - Medicine & health
4
620 - Engineering & allied operations
2
140 - Specific philosophical schools
1
540 - Chemistry & allied sciences
1