- Astronomy, Observations and Techniques 17
- Optics, Lasers, Photonics, Optical Devices 17
- Nuclear Energy 11
- Security Science and Technology 10
- Astrophysics and Astroparticles 8
- Nuclear Physics, Heavy Ions, Hadrons 8
- Nuclear Fusion 7
- Nuclear Medicine 7
- Elementary Particles, Quantum Field Theory 6
- Waste Management/Waste Technology 6
- Aerospace Technology and Astronautics 5
- Industrial and Production Engineering 5
- Measurement Science and Instrumentation 5
- Quantum Optics 5
- Remote Sensing/Photogrammetry 5
- Condensed Matter Physics 4
- Systems and Data Security 4
- Biological and Medical Physics, Biophysics 3
- Classical Electrodynamics 3
- Complex Systems 3