| Acronym | Meaning |
| MS | Machine Screw |
| CB | Constant Bandwidth |
| REI | Range From Entry Interface (400 K) |
| ACTS | (TOS) Advanced Communications Technology Satellite |
| HDRSS | High Data Rate Storage System |
| PSS | Propulsion Support System |
| CDRR | Contract Documentation Requirements Records |
| MSBLS | Microwave Scan Beam Landing System |
| HPOT | High Pressure Oxidizer Turbopump |
| REM | Release-Engage Mechanism |