| Acronym | Meaning |
| M | Maintainability |
| ALAE | Atmospheric Lyman Alpha Experiment |
| AST | Astro Star Tracker |
| CIA | Controller Interface Assembly |
| DF | Direction Finder (Finding) |
| FLG | Flag |
| POST | Payload Operations SuPport Team |
| DADE | Data Acquisition And Decommutation EquiPment |
| MODS | Modifications |
| OBS | Operational Biomed Sensors |