| Acronym | Meaning |
| GRP | Graphite Reinforced Plastic |
| IPK | Inupiaq Language (ISO 639-2 Code) |
| OTO | Ordo Templi Orientis (Latin |
| DIR | Defence Industrial Research |
| YG | Yottagram |
| G4 | Generation Four PowerPC Microprocessor -Assistant Chief-of-Staff |
| C4I OR C?I | Command |
| RLS | Restless Leg Syndrome |
| DMA | U.S. Defense Mapping Agency (became NIMA |
| EGCG | EpiGalloCatechin-3-Gallate |