| Acronym | Meaning |
 | PHF | Personal Hygiene Facility |
| NSTL | National Space Technology Laboratory (was MTF) |
| ISI | Instrumentation Support Instruction |
| IARS | Independent Air Revitalization System |
| SEO | Special Engineering Order |
| ETC | Estimate To Completion |
| TSR | Test Status Report |
| PRR | Parts Replacement Request |
| TPC | Telemetry Preprocessor Computer |
| CSE | Computer Support Equipment |
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