| Acronym | Meaning |
| RCLED | Resonant Cavity Light Emitting Diode |
| PCAD | Power Conditioning And Distribution (in Spacecraft) |
| IFFD | Intermittently Fed Fill And Draw System |
| FISP | Fast Imaging With Steady-state Precession |
| IDAF | Interacting Distributed Approximating Function (propagator |
| AIN | American Institute Of Nutrition |
| IMPATT | Impact Avalanche Transit-time |
| NDT | Nondestructive Testing |
| CISA | Continuum Intermediate-state Approxn. (for Scattering) |
| BHN | Brinell Hardness Number |