| Acronym | Meaning |
 | MK | Air Mauritius (IATA Code) - Macedonia (ISO 3166 Digram; FIPS 10-4 Country Code) -Mandalskameratene (Norwegian Football Club) -Megakelvin -Missionary Kid - Mortal Kombat (game) |
| RAMARK | RAdar MARKer |
| TCL | Tool Command Language |
| FINA | F?d?ration Internationale De Natation (French |
| GULAG | Glavnoye Upravleniye Ispravitelno-trudovykh LAGerei I Kolonii (Russian ??????? ?????????? ????????????? ???????? ??????? ? ??????? |
| VLF | Very Low Frequency |
| GUT | Grand Unification Theory |
| CONUS | Continental United States |
| L | Fifty (in Roman Numerals) -Label - Lap - Large - Laser (US Military Aircraft Basic Mission Designation) - Latin - Left -Litre -Low (transmissions) |
| IA | Interlingua Language (ISO 639-1 Code) |
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