| Acronym | Meaning |
 | CIAO | Critical Infrastructure Assurance Office - Component-Integrated ACE ORB |
| SEAD | Suppression Of Enemy Air Defence |
| EIA | Environmental Impact Assessment |
| TTFN | Ta Ta For Now |
| UCS | Union Of Concerned Scientists |
| HRED | (U.S. Army Research Laboratory's) Human Research And Engineering Directorate (Aberdeen Proving Ground |
| OB | Obedience - Obligation - Obligatory - Obsolete - Obstetrics -Ocean Beach (California) - Off Break (cricket) - Old Bryanstonian - Order Of Battle - Outlet Box (electrical) -Overbought (stock Market) -Oversight Board |
| NEA | Near-Earth Asteroid - Nuclear Energy Agency (OECD) |
| CUB | Cuba (ISO 3166 Trigram) |
| RIS | Range Instrumentation System |
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