Classification
621 - Applied physics
284
535 - Light & infrared & ultraviolet phenomena
20
620 - Engineering & allied operations
20
537 - Electricity & electronics
15
530 - Physics
10
520 - Astronomy & allied sciences
6
610 - Medicine & health
6
539 - Modern physics
4
629 - Other branches of engineering
3
541 - Physical chemistry
2
624 - Civil engineering
2
670 - Manufacturing
2
000 - Computer science, information & general works
1
003 - Systems
1
004 - Data processing & computer science
1
006 - Special computer methods
1
384 - Communications; telecommunication
1
389 - Metrology & standardization
1
519 - Probabilities & applied mathematics
1
531 - Classical mechanics; solid mechanics
1
534 - Sound & related vibrations
1
538 - Magnetism
1
612 - Human physiology
1
691 - Building materials
1