| Acronym | Meaning |
 | NSA | U.S. National Security Agency - Naval Support Activity - No Strings Attached |
| ADD | Analog Digital Digital (CD Quality) - Attention-Deficit Disorder - Administration On Developmental Disabilities |
| AS | Adult Swim -Assamese Language (ISO 639-1 Code) - Attosecond |
| ASD | (U.S.) Assistant Secretary Of Defense - Autism Spectrum Disorder |
| ARBA | Army Review Boards Agency |
| NRC | National Research Council (U.S.) - Nuclear Regulatory Commission (U.S.) |
| COPE | U.K. Committee On Publication Ethics |
| LY | Libya (FIPS 10-4 Country Code; ISO 3166 Digram) - Lithuania (amateur Radio ITU Prefix) |
| KN | Kannada Language (ISO 639-1 Code) |
| DHRA | (U.S.) DoD Human Resources Activity |
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