| Acronym | Meaning |
| EEM | Electronegativity Equalization Method |
| REP | Rotating Electrode Process |
| ECRIS | Electron Cyclotron Resonance Ion Source |
| UPTF | Upper Plenum Test Facility |
| IMXA | Ion Microprobe X-ray Analysis |
| RLV | Reusable Launch Vehicles (aeronautics) |
| FSGF | FREEON Symmetric Group Formulation (of Hartree-Fock Theory) |
| CARS | Coherent Anti-Stokes Raman Spectroscopy |
| MCT | Mercury Cadmium Telluride |
| MC | Mclean-Chandler Basis Set |