Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
600 - Technology
333 - Economics of land & energy
7
363 - Other social problems & services
7
700 - The arts; fine & decorative arts
5
610 - Medicine & health
4
900 - History & geography
4
000 - Computer science, information & general works
3
370 - Education
3
720 - Architecture
3
140 - Specific philosophical schools
2
300 - Social sciences
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
658 - General management
2
336 - Public finance
1
340 - Law
1
361 - Social problems & social welfare in general
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1