| Acronym | Meaning |
 | DFR | Defrost |
| SPFP | Single Point Failure Potential |
| HSI | Horizontal Situation Indicator |
| MCCC | Mission Control And Computing Center |
| SRSS | Shuttle Range Safety System |
| LOS | Input/Output Supervision |
| OTBD | Outboard |
| PLISN | Provisioning List Item Sequence Number |
| PPM | Pulse Per Minute |
| MOS | Metal Oxide On A Substrate |
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