Classification
541 - Physical chemistry
21
620 - Engineering & allied operations
8
540 - Chemistry & allied sciences
7
621 - Applied physics
6
333 - Economics of land & energy
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
3
576 - Genetics & evolution
3
600 - Technology
3
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
543 - Analytical chemistry
2
660 - Chemical engineering
2
140 - Specific philosophical schools
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
530 - Physics
1
547 - Organic chemistry
1
571 - Physiology & related subjects
1
629 - Other branches of engineering
1
647 - Management of public households
1
800 - Literature & rhetoric
1