| Acronym | Meaning |
| ETR | Element Test Review |
| H | Henry |
| ACC | Accumulator |
| AFD | Acid Fractionator Distillate |
| ERG | External Review Group |
| IFC | InFlight Black Body Calibrator |
| OMB | Office Of Management And Budget |
| BLSG | Boundary Layer Sensing Group |
| MOPS | Millions Of Operations (106) Per Second |
| DRE | Defense Research And Engineering |