Classification
333 - Economics of land & energy
6
340 - Law
600 - Technology
5
363 - Other social problems & services
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
3
140 - Specific philosophical schools
2
170 - Ethics
2
300 - Social sciences
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
610 - Medicine & health
2
720 - Architecture
2
800 - Literature & rhetoric
2
900 - History & geography
2
000 - Computer science, information & general works
1
330 - Economics
1
414 - Phonology & phonetics
1
530 - Physics
1