Classification
600 - Technology
620 - Engineering & allied operations
658 - General management
700 - The arts; fine & decorative arts
900 - History & geography
5
330 - Economics
4
363 - Other social problems & services
3
333 - Economics of land & energy
2
370 - Education
2
380 - Commerce, communications & transportation
2
720 - Architecture
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
800 - Literature & rhetoric
1