| Acronym | Meaning |
| GBS | Guillain-Barre Syndrome |
| MET | Many Electron Theory (for Singlet Ground State) |
| MRS | Monitored Retrievable Storage (for Radioactive Wastes) |
| SIIMS | Secondary Ion Imaging Mass Spectrometry |
| RAPIDS | Regional Air Pollutant Inventory Development System |
| CIPSO | Configuration Interaction (with) Perturbation (including) Spin-orbit Coupling |
| NASQAN | National Stream Quality Accounting Network |
| EBM | Electron Beam Melting |
| SEN | Submerged Entry Nozzle |
| SCALE | Symmetrically Configured AC Light Emitting [device] |