Classification
330 - Economics
600 - Technology
8
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
8
720 - Architecture
900 - History & geography
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
4
576 - Genetics & evolution
4
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
370 - Education
2
400 - Language
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
300 - Social sciences
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
658 - General management
1
800 - Literature & rhetoric
1