| Acronym | Meaning |
 | CTI | Co-operative Target Identification |
| IMSA | Illinois Mathematics And Science Academy - International Mind Sports Association - International Motor Sports Association |
| RPL | Reverse Polish Lisp |
| FIU | Florida International University |
| TUN | Tunisia (ISO 3166 Trigram) |
| WF | Wallis And Futuna Islands (ISO 3166 Digram) |
| FF | Femtofarad |
| MHLW | Mean Higher Low Water (nautical Charts) |
| SMIL | Synchronized Multimedia Integration Language |
| YD | People's Democratic Republic Of Yemen (ISO 3166 Digram |
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