Classification
000 - Computer science, information & general works
4
551 - Geology, hydrology & meteorology
610 - Medicine & health
330 - Economics
3
333 - Economics of land & energy
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
530 - Physics
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
800 - Literature & rhetoric
1