| Acronym | Meaning |
 | MRI | Magnetic Resonance Imaging |
| BTI | Bacillus Thuringiensis Israelensis |
| RUN | Kirundi Language (ISO 639-2 Code) |
| IS | Iceland (ISO 3166 Digram) - Israel (FIPS 10-4 Country Code) |
| RMA | Return Mailing Authorization - Revolution In Military Affairs |
| MKSA | Metre-Kilogram-Second-Ampere (system Of Units) |
| GS | General Support -Gigasiemens - South Georgia And The South Sandwich Islands (ISO 3166 Digram) |
| PCB | See Entry |
| J | Joule |
| CCG | Canadian Coast Guard - Collectible Card Game |
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