| Acronym | Meaning |
| RCO | Regenerative Catalytic Oxidizer |
| RAMC | Risk Assessment And Management Commission |
| MEPSAG | Minimum Energy Path Semiclassical Adiabatic Ground-state (tunneling Approxn.) |
| NFAIS | National Federation Of Abstracting And Information Services |
| LIS | Lanthanide-induced Shift |
| IAMAS | International Association Of Meteorological And Atmospheric Sciences |
| NNI | National Nanotechnology Initiative |
| STIS | Space Telescope Imaging Spectrograph |
| AWG | Arrayed Waveguide Grating |
| BSH | Bile Salt Hydrolase |