| Acronym | Meaning |
 | ECI | Earth Centered Inertia (inertials) |
| IPD | Information Processing Division |
| CCB | Configuration Change Board |
| OPTB | Operational Program Time Base |
| M/U | Mockup |
| LLCF | Launch And Landing Computational Facilities |
| ORCHIS | System |
| SPPP | Spacelab Payloads Processing Project |
| SEADS | Shuttle Entry Air Data System |
| VISC | Viscosity |
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