Classification
530 - Physics
620 - Engineering & allied operations
7
000 - Computer science, information & general works
6
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
600 - Technology
2
330 - Economics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1