| Acronym | Meaning |
 | C4 OR C? | Command |
| AAAS | American Association For The Advancement Of Science |
| PAPI | Precision Approach Path Indicator (aviation) |
| CLEMARS | California Law Enforcement Mutual Aid Radio System |
| LU | Lutetium |
| ESU | Emergency Services Unit |
| EDA | European Defence Agency |
| NISER | National Institute Of Science Education And Research |
| GF | French Guiana (ISO 3166 Digram) - Gigafarad |
| MG | Magnesium - Megagram |
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