Classification
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
600 - Technology
330 - Economics
12
333 - Economics of land & energy
11
363 - Other social problems & services
9
620 - Engineering & allied operations
8
900 - History & geography
8
000 - Computer science, information & general works
6
580 - Plants (Botany)
6
320 - Political science
5
700 - The arts; fine & decorative arts
4
610 - Medicine & health
3
630 - Agriculture & related technologies
3
720 - Architecture
3
140 - Specific philosophical schools
2
340 - Law
2
370 - Education
2
658 - General management
2
336 - Public finance
1
361 - Social problems & social welfare in general
1
530 - Physics
1
800 - Literature & rhetoric
1