| Acronym | Meaning |
| PIECP | Preliminary Impact Engineering Change Proposal |
| NOT | RequireNot Required |
| MEC | Mission Events Controller |
| PC | Chamber Pressure |
| HCMM | Heat Capacity Mapping Mission |
| SPD | R Software Preliminary Design Review |
| LETF | Launch Equipment Test Facility (KSC) |
| OPS | Operations |
| COMP | Compass |
| ECG | Electrocardiograph |