| Acronym | Meaning |
| GCA | Generator Coordinate Approxn. |
| EST | Expressed Sequence Tag |
| EBS | Engineered Barrier System (for Hazardous Waste Disposal) |
| AAD | Atomic Absorption Detector |
| PACT | Process Automation Configuration Tool [EPRI Software] |
| RI | Refractive Index |
| STW | Surface Transverse Wave |
| WRAS | Waste Reduction Advisory System |
| CCOSM | Chemistry And Circulation Occultation Spectroscopy Mission |
| HESC | Human Embryonic Stem Cell |