| Acronym | Meaning |
 | PAD | Propellant Acquisition Device |
| S-BD | S-Band |
| PTI | Preliminary Test Information |
| CLM | Care Logic Module |
| FSS | Fire Suppression System |
| IIS | Joint Integrated Simulation |
| DACS | Digital Acquisition And Control System |
| MMCA | Mid Motor Controller Assembly |
| SUBJ | Subject |
| OIC | Orbiter (Orbital) Integrated Checkout |
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