| Acronym | Meaning |
 | ARL | UK Admiralty Research Laboratory (1921?1977) - U.S. Army Research Laboratory - UIUC Aviation Research Laboratory |
| ME | Maine (postal Symbol) -Mechanical Engineer[ing] - Medical Examiner - Middle East -Middle East Airlines (IATA Code) -Memory Effect - Myalgic Encephalomyelitis |
| N/T | (Aa) No Text |
| CRD | Capstone Requirements Document |
| ESU | Emergency Services Unit |
| RAC | Royal Automobile Club (in The United Kingdom |
| AARP | (i/s) American Association Of Retired Persons (now Officially Known Only By The Initials) |
| NYA | Chichewa Language (ISO 639-2 Code) |
| MKD | Macedonian Denar (ISO 4217 Currency Code) - Republic Of Macedonia (ISO 3166 Trigram) |
| MYT | Mayotte (ISO 3166 Trigram) |
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