Classification
551 - Geology, hydrology & meteorology
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
600 - Technology
3
140 - Specific philosophical schools
2
320 - Political science
2
400 - Language
2
500 - Natural sciences & mathematics
2
530 - Physics
2
620 - Engineering & allied operations
2
300 - Social sciences
1
363 - Other social problems & services
1
370 - Education
1
550 - Earth sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
800 - Literature & rhetoric
1
900 - History & geography
1