| Acronym | Meaning |
 | CI | Continuous Interlock |
| SG | LSSpace Ground Link Station |
| PIAR | Project Impact Analysis Report |
| LESS | Leading Edge Structure Subsystem |
| SCNR | Scanner |
| IU | Instrument Unit |
| OA | Office Of Applications (now OSTA) |
| HI | Honeywell |
| MTVC | Manual Thrust Vector Control |
| RDD | Requirements Definition Document |
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