81Vxx Applications to specific physical systems

• 81V05 Strong interaction, including quantum chromodynamics
• 81V10 Electromagnetic interaction; quantum electrodynamics
• 81V15 Weak interaction
• 81V17 Gravitational interaction
• 81V19 Other fundamental interactions
• 81V22 Unified theories
• 81V25 Other elementary particle theory
• 81V35 Nuclear physics
• 81V45 Atomic physics
• 81V55 Molecular physics, See also {92E10}
• 81V70 Many-body theory
• 81V80 Quantum optics
• 81V99 None of the above but in this section