| Acronym | Meaning |
 | ME | Maine (postal Symbol) -Mechanical Engineer[ing] - Medical Examiner - Middle East -Middle East Airlines (IATA Code) -Memory Effect - Myalgic Encephalomyelitis |
| RPR | FOM - Realtime Platform Reference Federation Object Model (reaper Fomm) |
| MSEC | Message Security Encryption Code (emm-sec) |
| AST | Atlantic Standard Time (UTC-4 Hours) |
| WVIAC | West Virginia Intercollegiate Athletic Conference |
| FS | Femtosecond |
| GDC | General Dental Council |
| KM | Khmer Language (ISO 639-1 Code) - Kilometre |
| PLW | Palau (ISO 3166 Trigram) |
| AFSC | U.S. Air Force Staff College (obsolete; Replaced With JFSC). - U.S. Air Force Systems Command |
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