Classification
621 - Applied physics
198
535 - Light & infrared & ultraviolet phenomena
18
620 - Engineering & allied operations
16
537 - Electricity & electronics
13
530 - Physics
9
520 - Astronomy & allied sciences
6
610 - Medicine & health
6
539 - Modern physics
4
541 - Physical chemistry
2
629 - Other branches of engineering
2
670 - Manufacturing
2
003 - Systems
1
006 - Special computer methods
1
389 - Metrology & standardization
1
519 - Probabilities & applied mathematics
1
531 - Classical mechanics; solid mechanics
1
538 - Magnetism
1
612 - Human physiology
1
624 - Civil engineering
1