| Acronym | Meaning |
 | NAAQS | National Ambient Air Quality Standards |
| GRB | Gamma-Ray Burst |
| LAR | Light Armoured Reconnaissance - Logistics Assistance Representative |
| NIC | Network Interface Card -Nicaragua (ISO 3166 Trigram) |
| TLAR | That Looks About Right (chat Shorthand) - Transporter-Launcher And Radar |
| IP | Clipperton Island (FIPS 10-4 Territory Code) -Initial Point - Intellectual Property - Internet Protocol |
| SIG | .signature (UNIX Shell/Internet Standard File Name) -Special Interest Group |
| GPIB | General-Purpose Instrumentation/Interface Bus |
| IFF | Identification |
| TN | Tennessee (postal Symbol) - Teranewton - Tonga (FIPS 10-4 Country Code) - Tunisia (ISO 3166 Digram) |
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