| Acronym | Meaning |
| SLAR | Side Looking Airborne Radar |
| GME | Generalized Master Equation (in Quantum Statistical Mechanics) |
| IAD | Ion Assisted Deposition |
| EXFAS | Extended Fine Auger Structure |
| PALS | Positron Annihilation Lifetime Spectroscopy |
| HRGS | High-resolution Gamma-ray Spectrometry |
| INO | Iterative Natural Orbital |
| OCAP | Open-channel Air Preheater |
| HMM | Heavy Meromyosin |
| NTI | Negative Thermal Ionization (for Mass Spectrometry) |