| Acronym | Meaning |
 | OMA | Open Mobile Alliance - Operations & Maintenance |
| HKG | Hong Kong (ISO 3166 Trigram) |
| MEC | Maine Central Railroad (AAR Reporting Mark) - Manta |
| PBS | Public Broadcasting Service |
| AC | Adriamycin-Cyclophosphamide (chemotherapy) - Air Conditioning - Alternating Current - Ante Christum (Latin |
| MKO | Mojahedin-e-Khalq Organization (Arabic People's Mujahedin Of Iran) |
| TAAR | Trace Amine-Associated Receptor |
| NDP | New Democratic Party (Canada) |
| ASD(FMP) | (U.S.) Assistant Secretary Of Defense (Force Management Policy) |
| RAC | Royal Automobile Club (in The United Kingdom |
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