| Acronym | Meaning |
 | AGARD | Advisory Group For Aerospace Research And Development |
| OR | Operating Room (surgery) - Operational/Operations Research -Oregon (postal Symbol) |
| SLR | Single-Lens Reflex (camera) |
| FSS | Fire Support Station |
| PNAC | Project For The New American Century |
| SNG | Satellite News Gathering (television) |
| TDRS | Tracking Data And Relay Satellite |
| HCCI | Homogeneous Charge Compression Ignition |
| WLN | Walloon Language (ISO 639-2 Code) |
| IAF | Industrial Areas Foundation |
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