Classification
700 - The arts; fine & decorative arts
10
540 - Chemistry & allied sciences
8
600 - Technology
7
000 - Computer science, information & general works
6
620 - Engineering & allied operations
5
900 - History & geography
5
333 - Economics of land & energy
4
414 - Phonology & phonetics
3
610 - Medicine & health
3
363 - Other social problems & services
2
574 - [Unassigned]
2
580 - Plants (Botany)
2
621 - Applied physics
2
660 - Chemical engineering
2
140 - Specific philosophical schools
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
535 - Light & infrared & ultraviolet phenomena
1
541 - Physical chemistry
1
546 - Inorganic chemistry
1
547 - Organic chemistry
1
576 - Genetics & evolution
1
615 - Pharmacology & therapeutics
1
629 - Other branches of engineering
1