Classification
540 - Chemistry & allied sciences
900 - History & geography
620 - Engineering & allied operations
10
600 - Technology
9
000 - Computer science, information & general works
7
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
6
363 - Other social problems & services
4
370 - Education
4
500 - Natural sciences & mathematics
4
610 - Medicine & health
4
330 - Economics
3
100 - Philosophy & psychology
2
300 - Social sciences
2
380 - Commerce, communications & transportation
2
400 - Language
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
320 - Political science
1
530 - Physics
1
658 - General management
1
720 - Architecture
1