Classification
170 - Ethics
610 - Medicine & health
620 - Engineering & allied operations
600 - Technology
10
330 - Economics
5
333 - Economics of land & energy
5
363 - Other social problems & services
5
900 - History & geography
5
100 - Philosophy & psychology
4
340 - Law
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
720 - Architecture
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
300 - Social sciences
3
320 - Political science
3
580 - Plants (Botany)
3
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
800 - Literature & rhetoric
2
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
660 - Chemical engineering
1