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