Classification
000 - Computer science, information & general works
700 - The arts; fine & decorative arts
15
540 - Chemistry & allied sciences
7
333 - Economics of land & energy
6
363 - Other social problems & services
6
610 - Medicine & health
6
620 - Engineering & allied operations
6
580 - Plants (Botany)
5
600 - Technology
5
330 - Economics
4
414 - Phonology & phonetics
4
530 - Physics
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
2
800 - Literature & rhetoric
2
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1