| Acronym | Meaning |
| HRH | His (or Her) Royal Highness |
| OPI | Office Of Primary Interest - Open Prepress Interface |
| RUSI | Royal United Services Institute For Defence Studies |
| KC | Kilocoulomb |
| CS | Czech Language (ISO 639-1 Code) |
| VFR | Visual Flight Rules |
| SP | Special - Spring Tide (nautical Charts) |
| SETAC | Society For Environmental Toxicology And Chemistry |
| FAD | Flavin Adenine Dinucleotide |
| RD | Radio Disney |