Classification
000 - Computer science, information & general works
500 - Natural sciences & mathematics
333 - Economics of land & energy
6
600 - Technology
6
700 - The arts; fine & decorative arts
6
620 - Engineering & allied operations
5
330 - Economics
3
380 - Commerce, communications & transportation
3
363 - Other social problems & services
2
576 - Genetics & evolution
2
610 - Medicine & health
2
745 - Decorative arts
2
800 - Literature & rhetoric
2
900 - History & geography
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
621 - Applied physics
1
720 - Architecture
1