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