| Acronym | Meaning |
 | ICAO | International Civil Aviation Organization |
| EMCI | Engineering Model Configuration Inspection |
| SEAID | SuPport Equipment Abbreviated Items Description |
| PIM | Pulse Interval Modulation |
| MTM | Methods Time Measurement |
| EC | Engine Control |
| DDD | Display Decoder Drive |
| SPRAG | STS Payloads Requirements And AnalYsis Group |
| PERM | Permanent |
| RTIF | Real-Time Interface |
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