| Acronym | Meaning |
 | PBCK | Problem Between Chair And Keyboard (computer Help Desk In-joke) |
| JPN | Japanese Language (ISO 639-2 Code) |
| IHH | Idiopathic Hypogonadotropic Hypogonadism |
| CATT | Combined Arms Tactical Trainer |
| SAVAK | Sazamane Etelaat Va Amniate Kechvar (Iranian Security And Intelligence Service) |
| VBA | Visual Basic For Applications |
| BDFL | Benevolent Dictator For Life |
| BMNT | Begin Morning Nautical Twilight |
| COSCOM | Corps Support Command (military) |
| RDECOM | (U.S.) Research |
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