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