Classification
551 - Geology, hydrology & meteorology
000 - Computer science, information & general works
3
700 - The arts; fine & decorative arts
3
400 - Language
2
500 - Natural sciences & mathematics
2
530 - Physics
2
600 - Technology
2
140 - Specific philosophical schools
1
320 - Political science
1
363 - Other social problems & services
1
370 - Education
1
550 - Earth sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1