| Acronym | Meaning |
 | OBS | Observation/Observer - Obsolete - Obstacle -Off Balance Sheet - Optical Burst Switching (IEEE) - Organic Brain Syndrome - Organization(al) Breakdown Structure |
| NAVCC | National Audio-Visual Conservation Center |
| DOI | Digital Object Identifier - U.S. Department Of The Interior |
| GHB | Gamma-HydroxyButyrate |
| TUR | Turkey (ISO 3166 Trigram) |
| GCI | Ground-controlled Interception |
| ASCIET | All Services Combat Identification Evaluation Team |
| PBCK | Problem Between Chair And Keyboard (computer Help Desk In-joke) |
| HO | Holmium |
| TH | Thai Language (ISO 639-1 Code) |
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