Classification
658 - General management
330 - Economics
7
610 - Medicine & health
5
700 - The arts; fine & decorative arts
5
363 - Other social problems & services
4
600 - Technology
4
000 - Computer science, information & general works
3
320 - Political science
3
333 - Economics of land & energy
3
338 - Production
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
370 - Education
2
500 - Natural sciences & mathematics
2
620 - Engineering & allied operations
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
300 - Social sciences
1
301 - Sociology & anthropology
1
384 - Communications; telecommunication
1
520 - Astronomy & allied sciences
1
617 - Surgery & related medical specialties
1
900 - History & geography
1