| Acronym | Meaning |
| OPHF | Orbital-polarized Hartree-Fock |
| EOD | Engineering Operations Division |
| PAG | Periaqueductal Gray |
| SIRTF | Space Infrared Telescope Facility |
| WET | Waste Extraction Test |
| ESIX | Electrically Switched Ion Exchange |
| USCE | US Army Corps Of Engineers |
| THTR | Thorium High Temperature Reactor |
| OD | Optical Density |
| MEED | Medium-energy Electron Diffraction |