| Acronym | Meaning |
| CIE | Communications Interface Equipment |
| RFO | Request For Order |
| SRR | Software Requirements Review |
| PPP | Payload Patch Panel |
| TPI | Terminal Phase Initiation |
| PC | Chamber Pressure |
| CBE | Connector Bracket |
| LINJET | Liquid Injection Electric Thruster |
| VGIMU | Velocity To Be Gained As Related To IMU Orientati |
| INSTRUM | Instrumentation Subsystem |