| Acronym | Meaning |
| NITFS | National Imagery Transmission Format Standard |
| AFRRI | (U.S.) Armed Forces Radiobiology Research Institute |
| RAE | UK Royal Aircraft Establishment (?1991) |
| PH | Parts Of Hydrogen (acidity/alkalinity Index) - Picohenry |
| DS | Darmstadtium |
| PLB | Personal Locator Beacon |
| MT | Malta (FIPS 10-4 Country Code; ISO 3166 Digram) - Megatesla - Montana (postal Symbol) -Motor Transport (military) |
| BRASS | Breathe |
| RS | Russia (FIPS 10-4 Country Code) |
| RI | Rhode Island (postal Symbol) |