| Acronym | Meaning |
 | RRN | Recurrence Rate Number |
| WIN | T -Warfighter Information Network-Tactical |
| CIWS | Close-In Weapon System |
| GIF | Graphics Interchange Format (pronounced Jif) |
| KUW | Kuwait (UNDP Country Code) |
| SAC | Standards Activity Committee (of SISO) - U.S. Strategic Air Command (1946-1992) |
| BRE | Breton Language (ISO 639-2 Code) |
| GPR | Ground-Penetrating Radar |
| IX | Nine (in Roman Numerals) |
| F&SF | (The Magazine Of) Fantasy & Science Fiction |
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