| Acronym | Meaning |
| HI | Hawaii (postal Symbol) |
| TFMPP | Trifluorophenylmethylpiperazine |
| SALT | Save A Life Today - Save A Life Today (SALT) Alert - Emergency Contact System |
| MADD | Mothers Against Drunk Driving - MyoAdenylate Deaminase Deficiency -Multiply-Add |
| BW | Botswana (ISO 3166 Digram) |
| METL | Mission Essential Task List (mettle) |
| SKC | Clear Sky (METAR Code) |
| ROC | Receiver Operating Characteristic (statistics) - Regional Operations Centre - Republic Of China - Roc-A-Fella Records |
| IMO | In My Opinion - International Maritime Organization |
| UNICEF | United Nations Children's Fund (originally The United Nations International Children's Emergency Fund) |