Classification
333 - Economics of land & energy
370 - Education
581 - Specific topics in natural history
620 - Engineering & allied operations
600 - Technology
3
000 - Computer science, information & general works
2
320 - Political science
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
300 - Social sciences
1
330 - Economics
1
400 - Language
1
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1