| Acronym | Meaning |
| SLCA | ERNO Spacelab Contract Administration |
| TU | Transport Unit |
| OS | Operating System |
| PCIN | Program Change Identification Number |
| SOL | Squelch |
| PSID | Pounds Per Square Inch Differential |
| EPTU | Events Per Time Unit |
| FCD | Flight Control Division (JSC) |
| PPB | Program Performance Baseline |
| CV | Check Valve |