| Acronym | Meaning |
| QPMDA | Quasiparticle Mean Density Approxn. (assocd. With Local-d. Theory) |
| TIC | Total Ion Current |
| QET | Quasi-equilibrium Theory |
| ABR | Auditory Brainstem Response |
| MTR | Minimum Technology Requirements (RCRA) |
| SOCI | Standard Optimum Control [structure With] Integral [action] |
| OPO | Optical Parametric Oscillator |
| SHRS | Stimulated Hyper Raman Scattering |
| PSD | Post-source Decay |
| NMEP | National Materials Exposure Programme |