| Acronym | Meaning |
 | OA | Operational Analysis |
| AHA | American Heart Association |
| GM | The Gambia (ISO 3166 Digram) -GameMaster (role-playing) - General Motors - Genetically Modified -Germany (FIPS 10-4 Country Code) -Guru Meditation (computing) |
| GRL | Greenland (ISO 3166 Trigram) |
| MOP | Macau Pataca (ISO 4217 Currency Code) -Measure Of Performance |
| HO | Holmium |
| WHI | Women's Health Initiative |
| ACCA | Automatic Cloud Cover Assessment |
| FAD | Flavin Adenine Dinucleotide |
| LLAD | Low Level Air Defence |
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