Classification
000 - Computer science, information & general works
500 - Natural sciences & mathematics
620 - Engineering & allied operations
16
900 - History & geography
600 - Technology
15
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
10
330 - Economics
5
380 - Commerce, communications & transportation
4
363 - Other social problems & services
3
576 - Genetics & evolution
3
610 - Medicine & health
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
370 - Education
2
400 - Language
2
540 - Chemistry & allied sciences
2
658 - General management
2
120 - Epistemology, causation & humankind
1
340 - Law
1
410 - Linguistics
1
414 - Phonology & phonetics
1
530 - Physics
1
720 - Architecture
1
780 - Music
1
800 - Literature & rhetoric
1