| Acronym | Meaning |
| PIM | Pulse Interval Modulation |
| MA | Mission Analysis |
| OTL | Ordnance Test Laboratory |
| SI | Solar Inertial |
| EAC | Energy Absorbing Capacity |
| SD | Space Division (Rockwell) |
| SSRR | Station Set Requirements Review |
| KCRT | Keyboard Cathode RaY Tube |
| HLDS | Hydrogen Leak Detection System |
| IOB | InPut/Output Buffer (if Bus |