| Acronym | Meaning |
| HEPA | High-Efficiency Particulate Air (filter) |
| AL | Alabama (postal Symbol) - Albania (FIPS 10-4 Country Code; ISO 3166 Digram) -Anno Lucis (Latin |
| AGO | Angola (ISO 3166 Trigram) |
| HEAT | High Explosive Anti-Tank (ammunition) |
| SM | Samarium |
| STAT | Signal Transducers And Activators Of Transcription (cell Biology) - Special Tertiary Admissions Test (Australia) |
| FENS | Federation Of European Neuroscience Societies |
| SALT | Save A Life Today - Save A Life Today (SALT) Alert - Emergency Contact System |
| OSETI | Optical SETI |
| UR | Urdu Language (ISO 639-1 Code) |