| Acronym | Meaning |
| ETR | Eastern Test Range |
| TOPEX | Ocean Topography Experiment |
| DC | Delta Clipper |
| AURA | Association Of Universities For Research In Astronomy |
| ISO | International Standards Organization |
| TCM | Trajectory Control Maneuver |
| ETM | Enhanced Thematic Mapper |
| ENSO | El Nino/Southern Oscillation |
| GIF | Graphics Interchange Format |
| ETE | End-to-End |