| Acronym | Meaning |
| HAC | Heading Alignment Cylinder |
| SP | Standard Or Peculiar |
| PIAR | Project Impact Analysis Report |
| TD | Time Delay |
| SEAID | SuPport Equipment Abbreviated Items Description |
| CMO | Configuration Management Office |
| EHC | Electrical Heating Control |
| VLBI | Very Long Baseline Interferometer |
| DMS | Dynamic Motion Simulator |
| RECP | Request For Engineering Change Proposal |