Classification
620 - Engineering & allied operations
10
600 - Technology
9
900 - History & geography
9
700 - The arts; fine & decorative arts
8
330 - Economics
5
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
5
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
363 - Other social problems & services
3
576 - Genetics & evolution
3
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
304 - Factors affecting social behavior
1
340 - Law
1
414 - Phonology & phonetics
1
530 - Physics
1
658 - General management
1