| Acronym | Meaning |
| NRMS | Neutralization-reionization Mass Spectrometry |
| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| DTDMAC | Ditallowdimethylammonium Cation [surfactant] |
| IGCC | Integrated Gasification Combined Cycles (electric Power Generation Technology) |
| ORU | In Orbit Replaceable Unit (spacecraft) |
| BMC | Bulk-molding Compound |
| SAFIR | Smoke Gas Anal. By Fourier Transform IR Spectroscopy |
| NEXAFS | Near-edge X-ray Absorption Fine Structure |
| AMS | Accelerator Mass Spectrometry |
| NSCR | Nonselective Catalytic Reduction |