| Acronym | Meaning |
| DRL | Daytime Running Lights - Dorman Roberts Ltd. |
| MPSRON | Maritime Propositioning Ship Squadron |
| D&D | Dungeons And Dragons - Diversion And Distress (Air Traffic Control) |
| AARP | (i/s) American Association Of Retired Persons (now Officially Known Only By The Initials) |
| R&D | Research & Development |
| GM | The Gambia (ISO 3166 Digram) -GameMaster (role-playing) - General Motors - Genetically Modified -Germany (FIPS 10-4 Country Code) -Guru Meditation (computing) |
| DTG | Date-Time Group |
| FS | Femtosecond |
| TACCO | Tactical Coordinator |
| CK | Cocos (Keeling) Islands (FIPS 10-4 Country Code) - Cook Islands (ISO 3166 Digram) |