| Acronym | Meaning |
| TJK | Tajikistan (ISO 3166 Trigram) |
| IT | InferoTemporal (neurophysiology) - Information Technology -Italy (FIPS 10-4 Country Code; ISO 3166 Digram) |
| ACK | Acknowledge (telecommunications; Cf. NAK) |
| MA | Megaannum |
| INAS | International Near-Earth Asteroid Survey |
| BA | Bashkir Language (ISO 639-1 Code) |
| R&S | Reconnaissance & Surveillance |
| ADW | Air Defence Warning |
| CW | Continuous Wave (laser) -Cook Islands (FIPS 10-4 Territory Code) |
| APDS | Armour-Piercing |