| Acronym | Meaning |
| PGA | Programmable Gain Amplifier |
| TSS | Time Sharing System |
| HS | High Speed |
| RNG | Range |
| COMAS | Combined Orbital Maneuvering And Abort System |
| CMPR | Compare |
| NM | Network Manager (GSFC) |
| HSL | Hardware Simulation Laboratory |
| RADAR | Radio Detecting And Ranging |
| SPA | Space Processing Application |