| Acronym | Meaning |
| UT | Universal Time |
| CPG | Clinical Practice Guideline |
| LCD | Liquid Crystal Display |
| OP | Observation Point/Post |
| UNU | United Nations University |
| UWTG | Under Water Tug |
| USGS | United States Geological Survey |
| HV | Upper Volta (ISO 3166 Digram; Obsolete 1984) |
| OMG | Object Management Group - Oh |
| MHHW | Mean Higher High Water (nautical Charts) |