| Acronym | Meaning |
 | MNT | Molecular Nanotechnology -Mongolian Tugrik (ISO 4217 Currency Code) |
| PTAN | Precision Terrain Aided Navigation |
| CI | Chile (FIPS 10-4 Country Code) - C?te D'Ivoire (ISO 3166 Digram) -Counter-Intelligence |
| XAU | Gold Troy Ounce (ISO 4217 Currency Code) |
| APA | (i) American Psychiatric Association |
| DEA | Drug Enforcement Agency |
| MEC | Maine Central Railroad (AAR Reporting Mark) - Manta |
| AFM | Army Field Manual (UK; The U.S. More Frequently Uses Just FM) - Atomic Force Microscope - Aviation Fleet Maintenance |
| CALABARZON | A Region In The Philippines: CAvite |
| IBA | Important Bird Area |
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