Classification
340 - Law
500 - Natural sciences & mathematics
576 - Genetics & evolution
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
5
600 - Technology
5
000 - Computer science, information & general works
4
320 - Political science
4
363 - Other social problems & services
4
620 - Engineering & allied operations
4
900 - History & geography
4
140 - Specific philosophical schools
3
720 - Architecture
3
330 - Economics
2
333 - Economics of land & energy
2
530 - Physics
1
610 - Medicine & health
1