| Acronym | Meaning |
| SARS | Severe Acute Respiratory Syndrome |
| GD | Grenada (ISO 3166 Digram) |
| SIMAC | Semantic Interaction With Music Audio Contents |
| ZG | Zettagram |
| USNO | U.S. Naval Observatory |
| CTC | Closed Timelike Curve (relativity) - (U.S.) Combat Training Center |
| NESDIS | National Environmental Satellite |
| NCES | U.S. National Center For Education Statistics - Net-Centric Enterprise Services |
| ADC | Aide De Camp - U.S. Air Defense Command (1946-1992) - Apple Display Connector - Program Against Digital Counterfeiting Of Currency |
| INFOSEC | Information Security |