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