| Acronym | Meaning |
 | RSW | Resistance Spot Welding |
| RRC | Regional Response Center |
| PHWR | Pressurized Heavy Water Reactor |
| MBAS | Methylene Blue Active Substance (surfactant) |
| IPPA | Independent Pair-potential Approximation |
| APRR | Adiabatic Passage Rotational-resonance |
| ICON | International Council On Nanotechnology |
| NSSS | National Sewage Sludge Survey |
| OPIA | Optical Precision Instrument Associates |
| SOFIA | Stratospheric Observatory For Infrared Astronomy |
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