Classification
539 - Modern physics
530 - Physics
16
500 - Natural sciences & mathematics
6
621 - Applied physics
2
509 - Historical, geographic & persons treatment
1
510 - Mathematics
1
515 - Analysis
1
541 - Physical chemistry
1
600 - Technology
1
617 - Surgery & related medical specialties
1
620 - Engineering & allied operations
1
660 - Chemical engineering
1