| Acronym | Meaning |
 | DKK | Danish Krone (ISO 4217 Currency Code) |
| PSG | Pacific Seabird Group |
| MMI | Man-Machine Interface |
| VLF | Very Low Frequency |
| KATUSA | Korean Augmentation To United States Army |
| MBTA | Massachusetts Bay Transportation Authority - Migratory Bird Treaty Act (U.S.) |
| I/ITSEC | Interservice/Industry Training |
| PERL | Usually Lower Case Practical Extraction And Report Language |
| ATC | Air Traffic Control - Air Training Corps - U.S. Air Transport Command (1942-1948) |
| RBOC | Regional Bell Operating Company (Baby Bell) |
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