| Acronym | Meaning |
 | SLE | Sierra Leone (ISO 3166 Trigram) |
| CIEF | Comit? International D'enregistrement Des Fr?quences (International Frequency Registration Board) |
| CSA | Canadian Space Agency - Canadian Standards Association - Child Support Agency - Command Staff Advisor - Community-supported Agriculture - Confederate States Of America - Corps Storage Area -Czech Airlines |
| RTG | Radio-isotope Thermoelectric Generator Also Used For Rubber Tyred Gantry Crane |
| USPTO | United States Patent And Trademark Office |
| IUSS | Integrated Undersea Surveillance System - Integrated Unit Simulation System - International Union Of Soil Science |
| TED | Technology Entertainment Design Prize |
| OGC | Open Geospatial Consortium |
| MSI | Micro-Star International -Multispectral Imagery |
| FR | France (FIPS 10-4 Country Code; ISO 3166 Digram) |
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