Classification
333 - Economics of land & energy
600 - Technology
6
620 - Engineering & allied operations
6
900 - History & geography
6
580 - Plants (Botany)
4
610 - Medicine & health
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
576 - Genetics & evolution
2
720 - Architecture
2
800 - Literature & rhetoric
2