| Acronym | Meaning |
| HRPS | Hazard Reduction Precedence Sequence |
| CCRF | Consolidated Communication Recording Facility |
| EKG | Electrocardiogram (Record) |
| ETA | External Tank Attachment |
| BRG | Bearing |
| CG | Center Of Gravity |
| MPC | Meteorological Prediction Center |
| PIECP | Preliminary Impact Engineering Change Proposal |
| FPE | Functional Program Element |
| REDUN | Redundancy |