| Acronym | Meaning |
| MSA | Mammary Serum Antigen |
| UPA | Unitary-pole Approximation |
| NERVA | Nuclear Engine For Rocket Vehicle Application |
| ESC | Endometrial Stromal Cell |
| EBPVD | Electron Beam Physical Vapor Deposition |
| IRMM | Institute For Reference Materials And Measurements |
| SMIE | Solid-metal-induced Embrittlement |
| EPOCA | Environmental Project On Central America |
| SAT | Sulfuric Acid Trihydrate (polar Stratosphere Cloud Aerosol) |
| QRM | Quadratic Rubinow Method (variational Method For Scattering) |