| Acronym | Meaning |
| GRTLS | Glide Return To Landing Site |
| TEC | Test Equipment Center |
| PMS | Performance Management System |
| S/C | Spacecraft |
| HIPO | Hierarchy Plus InPut/Process/Output |
| PCA | Point Of Closest Approach |
| CNRL | Communications And Navigation Research Laboratory |
| LGIU | Laser Gyro Interface Unit |
| RLF | Relief |
| MACDS | Monitor And Control Display System |