| Acronym | Meaning |
 | RAC | Reference Air Concentration (USEPA) |
| RSD | Risk-specific Dose |
| SIMAAC | Simultaneous Multi-element Analysis With A Continuum Source |
| CPVC | Chlorinated Polyvinyl Chloride |
| SAED | Selected Area Electron Diffraction |
| MOVPE | Metallo-organic Vapor-phase Epitaxy |
| CHO | Complex Harmonic Oscillator (in Mol. Scattering Theory) |
| LET | Linear Energy Transfer (in Spacecraft Power Systems) |
| ITT | Impact Transition Temperature |
| VSEPR | Valence-shell Electron-pair Repulsion |
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