| Acronym | Meaning |
 | 4D | Four-dimensional (usually Three Spatial Plus One Temporal Dimension |
| SAAFR | Standard Use Army Aircraft Flight Route (safer) |
| TERS | Tactical Event Reporting System |
| METAR | [Meteorological] Aviation Routine Weather Report |
| FES | Flywheel Energy Storage |
| DXM | DeXtroMethorphan |
| NF | Nanofarad |
| DTSA | (U.S.) Defense Technology Security Administration |
| PIPA | Program On International Policy Attitudes |
| ERP | Engineer Regulating Point |
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