Classification
340 - Law
380 - Commerce, communications & transportation
500 - Natural sciences & mathematics
600 - Technology
9
620 - Engineering & allied operations
8
700 - The arts; fine & decorative arts
7
900 - History & geography
7
333 - Economics of land & energy
6
000 - Computer science, information & general works
5
363 - Other social problems & services
5
576 - Genetics & evolution
5
320 - Political science
4
530 - Physics
4
140 - Specific philosophical schools
3
330 - Economics
3
720 - Architecture
3
580 - Plants (Botany)
2
610 - Medicine & health
2
414 - Phonology & phonetics
1
630 - Agriculture & related technologies
1
658 - General management
1