| Acronym | Meaning |
| MBCS | Multi-Byte Character Set |
| FWC | Football World Cup |
| IGS | International Ground Station |
| HAT | Haitian Creole Language (ISO 639-2 Code) |
| PI | PolyImide - PolyIsoprene - Private Investigator |
| POR | Proposed Operational Requirement |
| HW | Hardware -High Water (nautical Charts) |
| NWRA | National Wildlife Rehabilitators Association |
| GPMP | General Purpose Macro Processor |
| UKR | Ukraine (ISO 3166 Trigram) |