| Acronym | Meaning |
| HGCU | Hot-gas-cleanup Unit |
| WMAP | Wilkinson Microwave Anisotropy Probe |
| LED | Light-emitting Diode |
| RFG | Reformulated Gasoline |
| OIT | Oxidative Induction Time |
| LSND | Liquid Scintillator Neutrino Detector |
| ARM | Advanced Reservoir Management (petroleum) |
| SRIM | Structural Reaction Injection Molding |
| ORPI | Off-resonance Proton Irradiation |
| NIDDM | Non-insulin-dependent Diabetes Mellitus |