| Acronym | Meaning |
| MANPADS | MAN-Portable Air Defence System |
| XIX | Nineteen (in Roman Numerals) |
| TN | Tennessee (postal Symbol) - Teranewton - Tonga (FIPS 10-4 Country Code) - Tunisia (ISO 3166 Digram) |
| HZ | Haze (METAR Code) |
| ECU | Ecuador (ISO 3166 Trigram) -European Currency Unit (ancestor Of The Euro) |
| FSSP | Families Of Structurally Similar Proteins |
| NAA | N-Acetylaspartate |
| SCUBA | Self Contained Underwater Breathing Apparatus |
| CVI | Combat Vehicle Identification |
| ASM | Assamese Language (ISO 639-2 Code) |