Classification
320 - Political science
340 - Law
576 - Genetics & evolution
700 - The arts; fine & decorative arts
140 - Specific philosophical schools
4
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
4
600 - Technology
4
620 - Engineering & allied operations
4
900 - History & geography
4
363 - Other social problems & services
3
720 - Architecture
3
330 - Economics
2
000 - Computer science, information & general works
1
170 - Ethics
1
333 - Economics of land & energy
1
530 - Physics
1
580 - Plants (Botany)
1
658 - General management
1
791 - Public performances
1
800 - Literature & rhetoric
1