| Acronym | Meaning |
 | MORP | Meteorite Observation And Recovery Project |
| PDD | Past Due Date - Presidential Decision Directive |
| IRR | Iranian Rial (ISO 4217 Currency Code) |
| MTQ | Martinique (ISO 3166 Trigram) |
| GNQ | Equatorial Guinea (ISO 3166 Trigram) |
| RNPS | Radio Network Planning System |
| ERTS | Earth Resources Technology Satellite (became Landsat) |
| NICP | National Inventory Control Point |
| NNW | North North-West |
| TSN | The Sporting News - The Sports Network |
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