| Acronym | Meaning |
 | PY | Paraguay (ISO 3166 Digram) - Person-Year -Portsmouth Yardstick |
| TAT | Tatar Language (ISO 639-2 Code) |
| PPQN | Pulses Per Quarter Note (ditto) |
| AFAIC | As Far As I'm Concerned |
| CEV | Combat Engineer Vehicle - Crew Exploration Vehicle |
| TN | Tennessee (postal Symbol) - Teranewton - Tonga (FIPS 10-4 Country Code) - Tunisia (ISO 3166 Digram) |
| LLAD | Low Level Air Defence |
| AL | Attolitre |
| WAP | Wireless Application Protocol |
| CDC | Centers For Disease Control And Prevention - Control Data Corporation - Cult Of The Dead Cow |
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