| Acronym | Meaning |
| SSS | Stage Separation Subsystem |
| MCP | Measurements Control Procedure |
| MAD | Madrid |
| SMPTRB | Shuttle Main Propulsion Test Requirement Board |
| MCIU | Manipulator Controller Interface Unit |
| ONBT | Orbiter Neutral Buoyancy Trainer |
| VR | Voltage Regulator |
| MFO | Major Function Overlay |
| TW | Traveling Wave |
| SD | Space Division (Rockwell) |