Classification
621 - Applied physics
9
620 - Engineering & allied operations
8
660 - Chemical engineering
4
536 - Heat
2
000 - Computer science, information & general works
1
500 - Natural sciences & mathematics
1
510 - Mathematics
1
530 - Physics
1
546 - Inorganic chemistry
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
628 - Sanitary & municipal engineering
1
668 - Technology of other organic products
1