| Acronym | Meaning |
 | HLDS | Hydrogen Leak Detection System |
| ESS | Experiment Subsystem Simulator |
| PAS | Primary Ascent System |
| BP | Checkout |
| SPC | Shuttle Processing Contractor |
| EU | Engineering Units |
| PAL | APA Indonesian Communications Satellite |
| TP&C | Thermal Protection And Control |
| MSC | Moding Sequencing And Control |
| SYN | Synchronous |
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