| Acronym | Meaning |
| IO | British Indian Ocean Territory (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| WHO | World Health Organisation |
| SAU | Saudi Arabia (ISO 3166 Trigram) |
| IKEA | Ingvar Kamprad (the Company's Founder) |
| P | Pico |
| BLUFOR | Blue Force(military) |
| LJ | La Jolla - Larry Johnson - LaserJet - Library Journal - Linux Journal - LiveJournal - Ljubljana - Lord Justice Of Appeal -Sierra National Airlines (IATA Code) |
| FOO | Forward Observation Officer |
| HND | Honduras (ISO 3166 Trigram) |
| MEDEVAC | Medical Evacuation |