| Abbreviation | Definition |
|---|---|
| ITP | Institute for Theoretical Physics |
| IUPAP | International Union Of Pure And Applied Physics |
| IV | Input Voltage |
| IW | Incident Wave |
| IWB | Improved Wigner Brillouin |
| IWEX | Inverse Wavefield EXtrapolation |
| J | Joules |
| J | Torsional Constant for a structural Section |
| JADE | Joint Analysis Of Dynamics And Equilibrium |
| JAP | Journal of Applied Physics |
| JARP | Journal of Advanced Research in Physics |
| JASPER | Joint Actinide Shock Physics Experimental Research |
| JB | Jacquet-Blondel method |
| JC | Journey Cycles |
| JCAP | Journal of Cosmology and Astroparticle Physics |
| JCP | Journal of Computational Physics |
| JCV | Joule - Clausius Velocity |
| JDP | Joint Displacement Principle |
| JDS | Joint Density of States |
| JEPT | Journal of Engineering Physics and Thermophysics |