| Acronym | Meaning |
| RMP | Restricted Moeller-Plesset |
| IRMS | Isotope Ratio Mass Spectrometry |
| SRBSN | Sintered Reaction-bonded Silicon Nitride |
| MCL | Maximum Contaminant Level |
| CID | Collision-induced Dissociation |
| SCMPS | Spin-corrected Moeller-Plesset Nth-order |
| MRF | Myogenic Regulatory Factor |
| CNG | Compressed Natural Gas |
| MAHRSI | Middle Atmosphere High Resolution Spectrograph Investigation |
| HMM | Half Molecule Model (for Electron Scattering By Molecules) |