Classification
000 - Computer science, information & general works
600 - Technology
700 - The arts; fine & decorative arts
10
620 - Engineering & allied operations
5
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
900 - History & geography
4
333 - Economics of land & energy
3
540 - Chemistry & allied sciences
3
330 - Economics
2
414 - Phonology & phonetics
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
500 - Natural sciences & mathematics
1
720 - Architecture
1
800 - Literature & rhetoric
1