Classification
600 - Technology
620 - Engineering & allied operations
900 - History & geography
35
700 - The arts; fine & decorative arts
27
333 - Economics of land & energy
22
363 - Other social problems & services
10
000 - Computer science, information & general works
8
330 - Economics
8
576 - Genetics & evolution
5
340 - Law
4
500 - Natural sciences & mathematics
4
580 - Plants (Botany)
4
380 - Commerce, communications & transportation
3
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
120 - Epistemology, causation & humankind
1
400 - Language
1
530 - Physics
1
610 - Medicine & health
1
800 - Literature & rhetoric
1