| Acronym | Meaning |
| HMCE | Her Majesty's Customs And Excise |
| SDC | Shaft Driven Compressor - U.S. Army Strategic Defense Command (1985?1992) |
| KIDS | Knowledge-based Integrated Design System |
| IO | British Indian Ocean Territory (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| RATELO | Radiotelephone Operator |
| DDT | Dichloro-Diphenyl-Trichloroethane (insecticide) - Dynamic Debugging Tool (computing) |
| FG | Femtogram |
| NWF | National Wildlife Federation |
| CIBC | Canadian Imperial Bank Of Commerce (obsolete) |
| ATN | Dronning Maud Land (ISO 3166 Trigram; Merged With AQ In 1983) |