Classification
400 - Language
551 - Geology, hydrology & meteorology
6
000 - Computer science, information & general works
5
140 - Specific philosophical schools
4
363 - Other social problems & services
4
370 - Education
4
610 - Medicine & health
3
700 - The arts; fine & decorative arts
3
330 - Economics
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
170 - Ethics
1
320 - Political science
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
530 - Physics
1
600 - Technology
1
620 - Engineering & allied operations
1
658 - General management
1