| Acronym | Meaning |
 | LR/LD | Line Receiver/Line Driver |
| TFE | Time From Event |
| SHORAN | Short Range Navigation |
| SCIS | Standard Cubic Inches Per Second |
| POWS | Project Operating Work Statement |
| OTBD | Outboard |
| EBS | Emergency Breathing Subsystem |
| CWA | Caution And Warning Annunciator |
| PPM | Pulse Position Modulation |
| FCT | Fuel Cell Test |
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