- ❪✺₁❫ Astronomical Classes ○
- ❪✺₁.❫ Classes of Radiation ○
- ❪✺₁❫ Electromagnetic Classes ○
- ❪✺₁❫ Mechanical Classes ○
- ❪✺₁❫ Relativistic Classes ○
- ❪✺₁ᵢ❫ Temporal Classes ○
- ❪✺₁❫ Thermodynamic Classes ○
- ❪𖣐₁;❫ Classes of Physics Data ○️
- ❪𖣐₂;❫ Classes of Physics Instrumentation ○
- Atom ○꠹
- Cycle ○꠹
- Fluid ○꠹
- Particle ○꠹
- Physical Constant ○꠹
- Physical Field ○꠹
- Physical Object ○꠹
- Physical Quantity ○꠹
- Redshift ○꠹
- Wave ○꠹