| Acronym | Meaning |
| TA | Target Acquisition - Teaching Assistant -Tera-ampere -Territorial Army (UK) -Tristan Da Cunha (ISO 3166 Digram) |
| TUC | Trades Union Congress |
| ARC | Arc-second Raster Chart - Association For Retarded Citizens - Appalachian Regional Commission |
| ROM | Read-Only Memory - Refuel On The Move - Royal Ontario Museum |
| NAFTA | North American Free Trade Agreement |
| ARTCC | Air Route Traffic Control Center |
| LSE | Least Squares Estimate/Error - London School Of Economics - London Stock Exchange |
| BR | Bromine |
| AMSO | U.S. Army Model And Simulation Office |
| RMP | Recognised [Operating/Operational] Maritime Picture |